Add static versions for libbacktrace and libnativebridge. Bug fixes.

Change-Id: Ic68ac15b2676e4f475330c8e7bb34e0d48783686
diff --git a/libbacktrace/Android.mk b/libbacktrace/Android.mk
index be8b803..395d677 100644
--- a/libbacktrace/Android.mk
+++ b/libbacktrace/Android.mk
@@ -68,6 +68,14 @@
 build_type := host
 libbacktrace_multilib := both
 include $(LOCAL_PATH)/Android.build.mk
+libbacktrace_static_libraries := \
+	libbase \
+	liblog \
+	libunwind \
+
+build_target := STATIC_LIBRARY
+include $(LOCAL_PATH)/Android.build.mk
+libbacktrace_static_libraries :=
 
 #-------------------------------------------------------------------------
 # The libbacktrace_test library needed by backtrace_test.