[PATCH] [ASan] Add process basename to log name and error message to simplify analysis of sanitized systems logs.

[Kostya Serebryany]

In http://reviews.llvm.org/D7333#141772, @ygribov wrote:

> Sure, thanks for the update. Could you guys make sure that this works properly with dynamic A- and UB-runtimes in GCC (which have separate sanitizer_commons)?


OMG. I'll let Alexey speak here, but if I were him I would not support this mode. 
What we should have is

- separate UBSan run-time
- bundled ASan+UBSan run-time

Having two sanitizers co-exist in the same process w/o properly knowing about each other is beyond of what we can reasonably maintain.


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