Don't fail if valgrind (system version not the google3 one) is missing.
If the test fail, print the output of the test.
Added .pyc to the gitignore file.
Previously we were looking for test files with this pattern: test_*
I added *_test.[cc|cpp] and *_unittest.[cc|cpp]
The search also scan all the subdirectories of the build_path from
the test definition.
I added a filtering stage where missing tests are ignored.
For instance we may have a source file that has not been built for
the target, in which case it is ignored when we run the target tests.
In android_build.py I added 4 helper functions to get access to the
build environment:
- GetHostBin
- GetProductOut
- GetTargetSystemBin
- GetHostOsArch
Replace all the hardcoded linux-x86 strings with the value returned
by GetHostOsArch.
