[ASan] Reenable __builtin_setjmp test on PowerPC, disable on SystemZ.
[ASan] Reenable __builtin_setjmp test on PowerPC, disable on SystemZ.

Since __builtin_setjmp has been fixed by rL267943, the test now works
on PowerPC.  Enable it.

On the other hand, the SystemZ backend doesn't currently support
__builtin_setjmp.  Disable it.

Differential Revision: http://reviews.llvm.org/D19657

git-svn-id: c199f293c43da69278bea8e88f92242bf3aa95f7@267946 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt