Thread suspension.

Includes SuspendAll/ResumeAll, and uses them in Heap and SignalCatcher.

Change-Id: Ie39b868ca5961f5016f367acade5071392bb723e
diff --git a/build/Android.common.mk b/build/Android.common.mk
index 1bd9367..05f20ff 100644
--- a/build/Android.common.mk
+++ b/build/Android.common.mk
@@ -20,6 +20,7 @@
 	external/gtest/include \
 	external/icu4c/common \
 	external/icu4c/i18n \
+	external/valgrind/dynamic_annotations \
 	external/zlib \
 	art/src \
 	dalvik/libdex