diff -r 947514442d05 -r cea0e462549a components/desktop/thunderbird/patches/firefox31-13-jit-test-multi-processes.patch
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/components/desktop/thunderbird/patches/firefox31-13-jit-test-multi-processes.patch	Mon Jan 11 09:27:45 2016 -0800
@@ -0,0 +1,14 @@
+For testing. This reduces memory needed for JIT test. The -f flag will print
+the full patch of failures (want to keep this).
+
+--- comm-esr31/mozilla/js/src/Makefile.in.orig	2015-06-04 17:42:51.305891808 -0700
++++ comm-esr31/mozilla/js/src/Makefile.in	2015-06-04 17:42:51.308235809 -0700
+@@ -152,7 +152,7 @@
+ 
+ check-jit-test::
+ 	$(JITTEST_ASAN_ENV) $(wildcard $(RUN_TEST_PROGRAM)) $(PYTHON) -u $(srcdir)/jit-test/jit_test.py \
+-	        --no-slow --no-progress --tinderbox --tbpl $(JITTEST_VALGRIND_FLAG) \
++	        --no-slow --no-progress --tinderbox --tbpl -j 2 -f $(JITTEST_VALGRIND_FLAG) \
+ 	        $(DIST)/bin/$(JS_SHELL_NAME)$(BIN_SUFFIX)
+ 
+ check:: check-style