device_(manifest|matrix).xml -> vendor_*

Building device_manifest.xml or device_compatibility_matrix.xml only
builds vendor manifest / matrices, but not all device manifest /
matrices (e.g. vintf_fragments, ODM manifest, etc.). Make the name more
accurate.

Test: m check-vintf-all

Change-Id: Ib017507c421355263d53a9e5b357f169c77da36d
diff --git a/target/board/Android.mk b/target/board/Android.mk
index c8705c3..5ac45ea 100644
--- a/target/board/Android.mk
+++ b/target/board/Android.mk
@@ -34,7 +34,7 @@
 ifdef DEVICE_MANIFEST_FILE
 # $(DEVICE_MANIFEST_FILE) can be a list of files
 include $(CLEAR_VARS)
-LOCAL_MODULE        := device_manifest.xml
+LOCAL_MODULE        := vendor_manifest.xml
 LOCAL_MODULE_STEM   := manifest.xml
 LOCAL_MODULE_CLASS  := ETC
 LOCAL_MODULE_PATH   := $(TARGET_OUT_VENDOR)/etc/vintf