Hide symbols in libbcc.so to save 800k space.

Change-Id: I036428b42e8232ab306a9d6a322012849a7140ba
diff --git a/Android.mk b/Android.mk
index a9f8794..d227e12 100644
--- a/Android.mk
+++ b/Android.mk
@@ -79,6 +79,10 @@
 	$(LOCAL_STATIC_LIBRARIES)
 endif
 
+# This hides most of the symbols in the shared library and reduces the size
+# of libbcc.so by about 800k.
+LOCAL_LDFLAGS += -Wl,--exclude-libs=ALL
+
 include $(LLVM_ROOT_PATH)/llvm-device-build.mk
 include $(BUILD_SHARED_LIBRARY)