ipacm: Remove debug tag from LOCAL_MODULE_TAGS

Removed debug tag for IPACM module from LOCAL_MODULE_TAGS since
it is deprecated. It conflicted with the ability for products
to specify which modules should be installed.

Change-Id: I84b7995644670cf2db86e14dff55458d645da820
diff --git a/ipacm/src/Android.mk b/ipacm/src/Android.mk
index 7853fb9..523fa94 100644
--- a/ipacm/src/Android.mk
+++ b/ipacm/src/Android.mk
@@ -96,7 +96,7 @@
 LOCAL_MODULE       := $1
 LOCAL_SRC_FILES    := $1
 LOCAL_MODULE_CLASS := ipacm
-LOCAL_MODULE_TAGS  := debug
+LOCAL_MODULE_TAGS  := optional
 LOCAL_MODULE_PATH  := $(TARGET_OUT_ETC)
 include $(BUILD_PREBUILT)