x86-64: Don't use fixups for GETSTATIC

Fixups are not known to work properly on 64-bit so don't use them. This
fixes this:

[penberg@golgotha jato]$ ./jato -Xtrace:exceptions -cp test/functional jvm/EntryTest
[main] SIGSEGV at RIP 051e9aa8 while accessing memory address 00000000.
[main] Registers:
[main]  rsp: 00007fffde9193d0
[main]  rax: 0000000041fb9d20   rbx: 0000000000008000   rcx: 0000000000008000
[main]  rdx: 0000000000000000   rsi: 0000000004921000   rdi: 0000000001a5fd20
[main]  rbp: 00007fffde9195b0   r8:  0000000000008000   r9:  0000000004921000
[main]  r10: 0000003ba1fb0778   r11: 0000000003de7b40   r12: 0000000000008000
[main]  r13: 000000000525cc80   r14: 0000000000000002   r15: 0000000001a5fd20
[main] Stack:
[main] 0000000001a5fd20 0000000001a5fd20 0000000004921000 0000000000000000
[main] 0000000000008000 0000000000008000 00007fffde919440 0000000005239800
[main] 0000000005296080 0000000000000000 00000000de919460 0000000003de7088
[main] Code: 00 00 00 20 a4 7c 04 00 00 00 00 80 99 1e 05 00 00 00 00 2f 00 00 00 00 00 00 00 e1 00 00 00 00 00 00 00 10 4b 1f 05 00 00 00 00 <30> 12 19 05 00 00 00 00 28 4b 1f 05 00 00 00 00 02 00 00 00 00
[main] Native and Java stack trace:
[main]  [<051e9aa8>] native     : signal_bh_trampoline+4dbbef4 (arch/x86/signal-bh.S:124)
[main]  [<41fb9140>] jit        : java/util/zip/Inflater.inflate(Inflater.java:322)
[main]  [<41fb77f4>] jit        : java/util/zip/InflaterInputStream.read(InflaterInputStream.java:196)
[main]  [<41f7b710>] jit        : java/io/InputStreamReader.read(InputStreamReader.java:393)
[main]  [<41f79a75>] jit        : java/io/BufferedReader.fill(BufferedReader.java:370)
[main]  [<41f7780b>] jit        : java/io/BufferedReader.readLine(BufferedReader.java:469)
[main]  [<41fb6c03>] jit        : gnu/java/util/jar/JarUtils.read_attributes(JarUtils.java:194)
[main]  [<41fb67a5>] jit        : gnu/java/util/jar/JarUtils.readMainSection(JarUtils.java:140)
[main]  [<41fb4456>] jit        : gnu/java/util/jar/JarUtils.readMFManifest(JarUtils.java:101)
[main]  [<41f38b51>] jit        : java/util/jar/Manifest.read(Manifest.java:162)
[main]  [<41f35b1d>] jit        : java/util/jar/Manifest.<init>(Manifest.java:89)
[main]  [<41f1ebdf>] jit        : java/util/jar/JarFile.readManifest(JarFile.java:303)
[main]  [<41f1d019>] jit        : java/util/jar/JarFile.<init>(JarFile.java:268)
[main]  [<41ecda04>] jit        : gnu/java/net/protocol/jar/Connection$JarFileCache.get(Connection.java:99)
[main]  [<41ecac72>] jit        : gnu/java/net/protocol/jar/Connection.connect(Connection.java:141)
[main]  [<41ec9cb2>] jit        : gnu/java/net/protocol/jar/Connection.getInputStream(Connection.java:159)
[main]  [<41ebfbbd>] jit        : java/net/URL.openStream(URL.java:737)
[main]  [<41bdc459>] jit        : java/lang/VMClassLoader.getBootPackages(VMClassLoader.java:262)
[main]  [<41bcb2ab>] jit        : java/lang/VMClassLoader.<clinit>(VMClassLoader.java:88)
[main]  [<004101b0>] native     : vm_class_init+175 (/home/penberg/jato/vm/class.c:748)
[main]  [<004254c2>] native     : vm_class_ensure_init+ffffffffffff2f64 (/home/penberg/jato/include/vm/class.h:126)
[main]  [<41bc5b22>] jit        : java/lang/VMClassLoader.getSystemClassLoader(VMClassLoader.java)
[main]  [<41bc7c43>] jit        : java/lang/ClassLoader$StaticData.<clinit>(ClassLoader.java:154)
[main]  [<004101b0>] native     : vm_class_init+175 (/home/penberg/jato/vm/class.c:748)
[main]  [<0041e47a>] native     : vm_class_ensure_init+fffffffffffebf1c (/home/penberg/jato/include/vm/class.h:126)
[main]  [<00419e0c>] native     : static_field_signal_bh+e (/home/penberg/jato/vm/static.c:66)
[main]  [<0042dc3b>] native     : signal_bh_trampoline+87 (arch/x86/signal-bh.S:124)
[main]  [<41bc4f20>] jit        : java/lang/ClassLoader.getSystemClassLoader(ClassLoader.java:796)
[main]  [<0041b4ea>] native     : native_call_gp+c6 (/home/penberg/jato/arch/x86/call.c:203)
[main]  [<0041b54f>] native     : native_call+42 (/home/penberg/jato/arch/x86/call.c:270)
[main]  [<0040f877>] native     : call_method_a+41 (/home/penberg/jato/vm/call.c:54)
[main]  [<0040f941>] native     : vm_call_method_v+99 (/home/penberg/jato/vm/call.c:71)
[main]  [<004119f2>] native     : vm_call_method_object+48e6 (/home/penberg/jato/include/vm/call.h:81)
[main]  [<00405e6f>] native     : do_main_class+18 (/home/penberg/jato/jato.c:1004)
[main]  [<00405775>] native     : ./jato() [0x405775]
[main]  [<3ba1c21734>] native     : signal_bh_trampoline+3ba17f3b80 (arch/x86/signal-bh.S:124)
Aborted (core dumped)

and makes it visible what's really happening:

[penberg@golgotha jato]$ ./jato -Xtrace:exceptions -cp test/functional jvm/EntryTest
[main] trace exception: exception object 0x459a240 (java/lang/IllegalArgumentException) thrown
[main] 	message	: 0x45b1e38 = "Non-positive averageCharsPerByte" (java/lang/String)
[main] 	from	: 0x40f86260: java/nio/charset/CharsetDecoder.<init>(Ljava/nio/charset/Charset;FFLjava/lang/String;)V
[main] 		  (CharsetDecoder.java:72)
[main] 	action	: unwind to 0x40f85a71: java/nio/charset/CharsetDecoder.<init>(Ljava/nio/charset/Charset;FF)V
[main] 		  (CharsetDecoder.java:89)

Signed-off-by: Pekka Enberg <penberg@kernel.org>