contrib/jenkins: don't run "make distcheck" on arm

Avoid building osmo-trx a second time on arm during "make distcheck". If
the build of osmo-trx already passed on arm, running "make distcheck"
should give the exact same result as on x86_64.

This should shorten the build time significantly for osmo-trx jobs
running on raspberry pis, currently they take half an hour.

Change-Id: Ib4fbf7d54d479bbdda3c1415493bfc57b37d3971

contrib/jenkins.sh

@@ -106,8 +106,11 @@ autoreconf --install --force
 $MAKE $PARALLEL_MAKE
 $MAKE check \
   || cat-testlogs.sh
-DISTCHECK_CONFIGURE_FLAGS="$CONFIG" $MAKE $PARALLEL_MAKE distcheck \
-  || cat-testlogs.sh
+
+if arch | grep -v -q arm; then
+	DISTCHECK_CONFIGURE_FLAGS="$CONFIG" $MAKE $PARALLEL_MAKE distcheck \
+	  || cat-testlogs.sh
+fi
 
 if [ "$WITH_MANUALS" = "1" ] && [ "$PUBLISH" = "1" ]; then
 	make -C "$base/doc/manuals" publish