Remove a reference to TARGET_BUILD_TYPE

We're soon going to stop using TARGET_BUILD_TYPE==debug to debug
native modules.

Signed-off-by: Dave Bort <dbort@android.com>
diff --git a/Android.mk b/Android.mk
index 1ebddfa..a454f81 100644
--- a/Android.mk
+++ b/Android.mk
@@ -67,9 +67,7 @@
 # of the product
 #LOCAL_CFLAGS += "-DTT_CONFIG_OPTION_BYTECODE_INTERPRETER"
 
-ifeq ($(TARGET_BUILD_TYPE),release)
-	LOCAL_CFLAGS += -O2
-endif
+LOCAL_CFLAGS += -O2
 
 LOCAL_MODULE:= libft2