[PATCH] Set symbolizer path in the test environment

[Evgeniy Stepanov]

  Unfortunately, for now users are stuck with either this environment setting, or an addr2line-based offline symbolization script. This will be fixed, but not today.

  I'm going to land this change as it is then. There is no harm in unconditionally setting these vars. As Alexey mentioned, they could be made conditional when the build system is sanitizer-aware.

http://llvm-reviews.chandlerc.com/D529