[Bug sanitizer/61978] implement blacklist for sanitizer

[kcc at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61978

--- Comment #4 from Kostya Serebryany <kcc at gcc dot gnu.org> ---
Note that the blacklist can not disable the checking inside the memcmp
interceptor. But it will disable instrumenting globals in QT, so 
if this is a global from QT (you did not post the full log) you will not see
the error.