Magic patch from bug 933336
Get me info for sandbox failures. DO NOT PUSH
mach: Pass through mochitest chunk options correctly.
Apparently debug builds need uname?
_PR_INET6_PROBE considered harmful
e10s/seccomp: Avoid FileUtils.getFile in tests.
More FileUtils whack-a-mole: marionette stuff for reftests
Bug 936312: Adjust tests' assumptions about B2G's WebGL support.
Bug 936169: Don't ignore failure to sandbox a non-preallocated child.
WORK IN PROGRESS: make KillHard less broken
Bug 926734: More specificity for which mappings might be libraries.
Revert "WORK IN PROGRESS: make KillHard less broken"

This reverts commit 9c9c474cdcacf2c82c52698049996a01dae2be3f.
Fix profiler mapping thing harder