asan: fix leak test for power platform
asan: fix leak test for power platform

Power is 64-bit but does not support leak detection,
so this test fails. Use the more robust leak-detection
predicate instead.



git-svn-id: c199f293c43da69278bea8e88f92242bf3aa95f7@231782 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