Implement cc_object vendor snapshot

cc_object modules are also necessary for vendor snapshot.

Bug: 157106227
Test: m vendor-snapshot
Change-Id: Idf4fd37a26f6f712f3cbab43133622f9f9bd9372
diff --git a/cc/androidmk.go b/cc/androidmk.go
index 5438b14..fede601 100644
--- a/cc/androidmk.go
+++ b/cc/androidmk.go
@@ -540,6 +540,25 @@
 	})
 }
 
+func (c *vendorSnapshotObjectLinker) AndroidMkEntries(ctx AndroidMkContext, entries *android.AndroidMkEntries) {
+	entries.Class = "STATIC_LIBRARIES"
+
+	if c.androidMkVendorSuffix {
+		entries.SubName = vendorSuffix
+	} else {
+		entries.SubName = ""
+	}
+
+	entries.ExtraFooters = append(entries.ExtraFooters,
+		func(w io.Writer, name, prefix, moduleDir string, entries *android.AndroidMkEntries) {
+			out := entries.OutputFile.Path()
+			varname := fmt.Sprintf("SOONG_%sOBJECT_%s%s", prefix, name, entries.SubName)
+
+			fmt.Fprintf(w, "\n%s := %s\n", varname, out.String())
+			fmt.Fprintln(w, ".KATI_READONLY: "+varname)
+		})
+}
+
 func (c *ndkPrebuiltStlLinker) AndroidMkEntries(ctx AndroidMkContext, entries *android.AndroidMkEntries) {
 	entries.Class = "SHARED_LIBRARIES"
 }