PPCJITInfo.cpp: Tweak r186252 with s/__ppc/__powerpc/ to work on powerpc-linux Fedora 12.

    g++ (GCC) 4.4.4 20100630 (Red Hat 4.4.4-10)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186396 91177308-0d34-0410-b5e6-96231b3b80d8
 This patch represents Mips utilization of r186388 code that alows asm matcher to emit mnemonics contain '.' characters. This makes asm parser code simpler and more efficient.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186397 91177308-0d34-0410-b5e6-96231b3b80d8