Allow GITHASH to be set on the command line, to work around a yocto bug.
diff --git a/scripts/make.sh b/scripts/make.sh
index 9c22d4f..4893e22 100755
--- a/scripts/make.sh
+++ b/scripts/make.sh
@@ -67,7 +67,7 @@
# Extract a list of toys/*/*.c files to compile from the data in $KCONFIG_CONFIG
# (First command names, then filenames with relevant {NEW,OLD}TOY() macro.)
-GITHASH="$(git describe --tags --abbrev=12 2>/dev/null)"
+[ -z "$GITHASH" ] && GITHASH="$(git describe --tags --abbrev=12 2>/dev/null)"
[ ! -z "$GITHASH" ] && GITHASH="-DTOYBOX_VERSION=\"$GITHASH\""
TOYFILES="$($SED -n 's/^CONFIG_\([^=]*\)=.*/\1/p' "$KCONFIG_CONFIG" | xargs | tr ' [A-Z]' '|[a-z]')"
TOYFILES="$(egrep -l "TOY[(]($TOYFILES)[ ,]" toys/*/*.c)"
