Add a GC stress run that uses a moving collector and small heap sizes.

Disable 3 run-tests for this configuration that fail for reasons relating to
OOME handling.
Add 012-math to the failing trace tests, it fails due to hitting a file size
limit when running in the interpreter.

Change-Id: Ia58f4c245d9d2d14caf5f2f2f3dcbfa40d4ccadb
diff --git a/build/Android.common_test.mk b/build/Android.common_test.mk
index bd698de..d5cfc52 100644
--- a/build/Android.common_test.mk
+++ b/build/Android.common_test.mk
@@ -45,6 +45,9 @@
 # Do you want tests with GC verification enabled run?
 ART_TEST_GC_VERIFY ?= $(ART_TEST_FULL)
 
+# Do you want tests with the GC stress mode enabled run?
+ART_TEST_GC_STRESS ?= $(ART_TEST_FULL)
+
 # Define the command run on test failure. $(1) is the name of the test. Executed by the shell.
 define ART_TEST_FAILED
   ( [ -f $(ART_HOST_TEST_DIR)/skipped/$(1) ] || \