makerelease.sh: Run git submodule after git checkout

Author: tatsuhiro-t

makerelease.sh

@@ -3,10 +3,11 @@
 TAG=$1
 PREV_TAG=$2
 
-git submodule update --init
 git checkout refs/tags/$TAG
 git log --pretty=fuller --date=short refs/tags/$PREV_TAG..HEAD > ChangeLog
 
+git submodule update --init --depth 1
+
 autoreconf -i
 ./configure && \
     make dist-bzip2 && make dist-gzip && make dist-xz || echo "error"