Get me info for sandbox failures. DO NOT PUSH
mach: Pass through mochitest chunk options correctly.
webgl: Allow B2G to support WebGL without breaking tests.
Fix the ARM/i386 mixup
Apparently debug builds need uname?
_PR_INET6_PROBE considered harmful
e10s/seccomp: Add more syscalls used during mochitests.

FormHistory invokes sqlite3, which calls fsync and geteuid.
SpecialPowers calls nsIFile's remove method, which uses lstat.
The crash reporter uses socketpair/sendmsg, to send a pipe back to the parent.
e10s/seccomp: Avoid FileUtils.getFile in tests.