fix build

[  1%] Building CXX object arch/6502/CMakeFiles/6502.dir/6502_translate.cpp.o /home/op/work/ukatemi/libcpu/arch/6502/6502_translate.cpp:7:10: fatal error: 'llvm/Instructions.h' file not found
         ^
	 1 error generated.
	 *** [arch/6502/CMakeFiles/6502.dir/6502_translate.cpp.o] Error
	 code 1
fix build

In file included from /home/op/work/ukatemi/libcpu/arch/6502/6502_translate.cpp:10:
/home/op/work/ukatemi/libcpu/libcpu/libcpu_llvm.h:5:10: fatal error: 'llvm/DerivedTypes.h' file not found
         ^
12 warnings and 1 error generated.
*** [arch/6502/CMakeFiles/6502.dir/6502_translate.cpp.o] Error code 1
fix build

In file included from /home/op/work/ukatemi/libcpu/arch/6502/6502_translate.cpp:10:
/home/op/work/ukatemi/libcpu/libcpu/libcpu_llvm.h:6:10: fatal error: 'llvm/LLVMContext.h' file not found
         ^
12 warnings and 1 error generated.
*** [arch/6502/CMakeFiles/6502.dir/6502_translate.cpp.o] Error code 1
fix build

/home/op/work/ukatemi/libcpu/arch/m88k/m88k_arch.cpp:1:10: fatal error: 'llvm/Instructions.h' file not found
         ^
1 error generated.
*** [arch/m88k/CMakeFiles/m88k.dir/m88k_arch.cpp.o] Error code 1
fix build

[  8%] Building CXX object arch/m88k/CMakeFiles/m88k.dir/m88k_translate.cpp.o
/home/op/work/ukatemi/libcpu/arch/m88k/m88k_translate.cpp:1:10: fatal error: 'llvm/Instructions.h' file not found
 #include "llvm/Instructions.h"
         ^
1 error generated.
*** [arch/m88k/CMakeFiles/m88k.dir/m88k_translate.cpp.o] Error code 1
fix build

[  9%] Building CXX object arch/mips/CMakeFiles/mips.dir/mips_translate.cpp.o
/home/op/work/ukatemi/libcpu/arch/mips/mips_translate.cpp:1:10: fatal error: 'llvm/Instructions.h' file not found
 #include "llvm/Instructions.h"
         ^
1 error generated.
*** [arch/mips/CMakeFiles/mips.dir/mips_translate.cpp.o] Error code 1
fix build

[ 11%] Building CXX object arch/arm/CMakeFiles/arm.dir/arm_translate.cpp.o
/home/op/work/ukatemi/libcpu/arch/arm/arm_translate.cpp:7:10: fatal error: 'llvm/Instructions.h' file not found
 #include "llvm/Instructions.h"
         ^
1 error generated.
*** [arch/arm/CMakeFiles/arm.dir/arm_translate.cpp.o] Error code 1