There could be a situation when a specific DSO was built with FORTIFY_SOURCE option. In case asan-ed binary link against that DSO,
libasan can't handle the possible memory error because it does not have interceptors for spinrtf_chk, snprintf_chk, vprintf_chk,
vsnprintf_chk, __fprintf_chk functions. Let's interceptors for them.
Patch by Denis Khalikov.
Differential Revision: https://reviews.llvm.org/D40951
llvm-svn: 320990
