Ensure partition_tag is always set correctly

partition_tag is now set to either VENDOR_, OEM_, or ODM_
even when LOCAL_[VENDOR|OEM|ODM]_MODULE isn't set but LOCAL_MODULE_PATH
is explicitly set to under $(TARGET_OUT_[VENDOR|OEM|ODM]).

Test: build walleye

Change-Id: I0f902061889fe0af1c39f6222e54faa80dd15794
diff --git a/core/base_rules.mk b/core/base_rules.mk
index b501fbd..592650d 100644
--- a/core/base_rules.mk
+++ b/core/base_rules.mk
@@ -65,6 +65,16 @@
   my_host_cross :=
 endif
 
+_path := $(LOCAL_MODULE_PATH) $(LOCAL_MODULE_PATH_32) $(LOCAL_MODULE_PATH_64)
+ifneq ($(filter $(TARGET_OUT_VENDOR)%,$(_path)),)
+LOCAL_VENDOR_MODULE := true
+else ifneq ($(filter $(TARGET_OUT_OEM)/%,$(_path)),)
+LOCAL_OEM_MODULE := true
+else ifneq ($(filter $(TARGET_OUT_ODM)/%,$(_path)),)
+LOCAL_ODM_MODULE := true
+endif
+_path :=
+
 ifndef LOCAL_PROPRIETARY_MODULE
   LOCAL_PROPRIETARY_MODULE := $(LOCAL_VENDOR_MODULE)
 endif