Bug 992238 - Disable test_init_destroy_multiple_contexts_and_streams on Windows 7. r=padenot, a=test-only
Bug 928678 - Hopeful fix for intermittent failure. r=jmaher, a=test-only
Bug 1036286 - Delay registration of the faulty.lib signal handler until when it's necessary. r=nfroyd, a=sledru

It's necessary to delay it because for the second part, we need to call dlopen,
and until recently bionic's linker dead-locked when using dlopen from a static
initializer.
Bug 1036286 - Ensure faulty.lib diverts libc's sigaction instead of a LD_PRELOADed one. r=nfroyd, a=sledru

and force-send calls to sigaction from faulty.lib-loaded libraries to the libc.
Bug 1042436 - Always enter the wrapper's compartment before invoking SilentFailure. r=gabor, a=sledru
Bug 1042436 - Lowercase the "reason" param to SilentFailure. a=sledru
Bug 1042436 - Warn once to the console when XrayWrappers deny access to an object. r=gabor, sr=smaug, a=sledru