mkimage-alpine.sh: Allow to change ARCH from the environment

Signed-off-by: Manfred Touron <m@42.am>
2015-02-13 13:37:21 +01:00 · 2015-02-13 13:37:21 +01:00 · 75f1c440dd
--- a/contrib/mkimage-alpine.sh
+++ b/contrib/mkimage-alpine.sh
@ -72,7 +72,7 @@ REL=${REL:-edge}
 MIRROR=${MIRROR:-http://nl.alpinelinux.org/alpine}
 SAVE=${SAVE:-0}
 REPO=$MIRROR/$REL/main
-ARCH=$(uname -m)
+ARCH=${ARCH:-$(uname -m)}
 tmp
 getapk