[unittests] Only build llvm-cfi-verify if X86 is in LLVM_TARGETS_TO_BUILD

The test requires a target for triple x86-64, and it fails in builds that
do not have the X86 backend.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@315861 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed