[ubsan] Move attribute specifier to fix build with gcc.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@172078 91177308-0d34-0410-b5e6-96231b3b80d8
UBSan: use %p not 0x%zx when printing pointers.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@172129 91177308-0d34-0410-b5e6-96231b3b80d8