manibuilder: Set sourcearcade.org as default source

Older docker images may have an outdated `origin'. So override
this with an up-to-date URL within the Makefile.

Change-Id: I00febdd587f96f0ce0781a65ed3ab3a714e6f61b
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.sourcearcade.org/c/flashprog/+/132
diff --git a/util/manibuilder/Makefile b/util/manibuilder/Makefile
index 47e3415..e325357 100644
--- a/util/manibuilder/Makefile
+++ b/util/manibuilder/Makefile
@@ -49,7 +49,7 @@
 $(ALL_TAGS): export QUIET_SETUP=$(QUIET_TEST)
 $(ALL_TAGS): export TEST_REMOTE?=$(if $(TEST_LOCAL),\
 					git://mani-git/flashprog.git,\
-					origin)
+					https://review.sourcearcade.org/flashprog.git)
 $(ALL_TAGS): export TEST_REVISION?=$(if $(TEST_LOCAL),HEAD,main)
 $(ALL_TAGS): %: %-check-build mani-net $(if $(TEST_LOCAL),local-git)
 	$(QUIET_TEST)docker rm -f mani_$(call ident,$*) >/dev/null 2>&1 || true