Merge pull request #1033 from 0xc0170/fix_buildreleaseexit

Tools - build_release - return 1 if any build fails

Author: 0xc0170

workspace_tools/build_release.py

@@ -126,3 +126,4 @@
     if failures:
         print "\n\nBuild failures:"
         print "\n".join(["  * %s" % f for f in failures])
+        sys.exit(1)