[PATCH] [Sanitizer RT] Put the module name string ownership in Symbolizer in order

[Timur Iskhodzhanov]

Like this?

Please note we have a warning if a function takes more than 512 bytes on stack, so I used `InternalScopedString` instead.  This implies `mmap`+`munmap` on each TU on process startup, plus a few times on shutdown.  I've tried the patch on `pdfium_test` and `chrome` and haven't observed much slowdown...

[TODO: update subject before comitting]


http://reviews.llvm.org/D8666

Files:
  lib/asan/asan_suppressions.cc
  lib/lsan/lsan_common.cc
  lib/sanitizer_common/sanitizer_coverage_libcdep.cc
  lib/sanitizer_common/sanitizer_symbolizer.cc
  lib/sanitizer_common/sanitizer_symbolizer.h
  lib/sanitizer_common/sanitizer_symbolizer_posix_libcdep.cc

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