Use full path in symbols zip file

This was accidentally changed when moving to soong_zip.

Change-Id: I5f889c3c83b6f888e765d4c35486576fa11f6945
diff --git a/core/Makefile b/core/Makefile
index f9de658..4ed8947 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -2058,7 +2058,7 @@
 	$(hide) rm -rf $@ $(PRIVATE_LIST_FILE)
 	$(hide) mkdir -p $(dir $@) $(TARGET_OUT_UNSTRIPPED) $(dir $(PRIVATE_LIST_FILE))
 	$(hide) find $(TARGET_OUT_UNSTRIPPED) | sort >$(PRIVATE_LIST_FILE)
-	$(hide) $(SOONG_ZIP) -d -o $@ -C $(TARGET_OUT_UNSTRIPPED) -l $(PRIVATE_LIST_FILE)
+	$(hide) $(SOONG_ZIP) -d -o $@ -C . -l $(PRIVATE_LIST_FILE)
 
 # -----------------------------------------------------------------
 # A zip of the Android Apps. Not keeping full path so that we don't