Bug 1377007 - autospider.py,runcppunittests.py export the path to directory js/src,r=Yoric

Some tests need to find out js/src to locate their test
data. Exporting this information as part of the environment.

MozReview-Commit-ID: JAefL2arhJL

testing/runcppunittests.py

@@ -8,6 +8,7 @@ from __future__ import with_statement
 import sys
 import os
 from optparse import OptionParser
+from os import environ as env
 import manifestparser
 import mozprocess
 import mozinfo
@@ -17,6 +18,9 @@ import mozlog
 
 SCRIPT_DIR = os.path.abspath(os.path.realpath(os.path.dirname(__file__)))
 
+# Export directory js/src for tests that need it.
+env['CPP_UNIT_TESTS_DIR_JS_SRC'] = os.path.abspath(os.path.join(SCRIPT_DIR, "..", ".."))
+
 
 class CPPUnitTests(object):
     # Time (seconds) to wait for test process to complete