Add LOCAL_FULL_INIT_RC to handle init_rc full path

Soong supports references to other modules for init_rc property, so full
paths need to be passed from Soong to make rather than module local
paths.

Test: m droid dist
Bug: 184567830
Change-Id: Ib1873a3418830f5cbf32e26f55d3ad0ab0d9c9c5
diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index 019892e..738ed4c 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -106,6 +106,7 @@
 LOCAL_FORCE_STATIC_EXECUTABLE:=
 LOCAL_FULL_CLASSES_JACOCO_JAR:=
 LOCAL_FULL_CLASSES_PRE_JACOCO_JAR:=
+LOCAL_FULL_INIT_RC:=
 LOCAL_FULL_LIBS_MANIFEST_FILES:=
 LOCAL_FULL_MANIFEST_FILE:=
 LOCAL_FULL_TEST_CONFIG:=