Fixing the standalone build of the emulator.

Change-Id: I81567b512df04314d87dd3846b02d8895829937d
diff --git a/Makefile b/Makefile
index 7b23968..9bb69f3 100644
--- a/Makefile
+++ b/Makefile
@@ -19,6 +19,7 @@
 
 BUILD_SYSTEM := android/build
 OBJS_DIR     := objs
+LIBS_DIR     := $(OBJS_DIR)/libs
 CONFIG_MAKE  := $(OBJS_DIR)/config.make
 CONFIG_H     := $(OBJS_DIR)/config-host.h