build: fix bashisms

Signed-off-by: Julien Danjou <julien@danjou.info>

build-utils/git-version-stamp.sh

@@ -5,22 +5,25 @@
 #
 # TODO: proper error handling
 
-die() {
-	echo "$0: WARNING: version stamp update failed."
-	#exit 1 # not important enough to stop the build.
-	exit 0
+die()
+{
+        echo "$0: WARNING: version stamp update failed."
+        #exit 1 # not important enough to stop the build.
+        exit 0
 }
 
 STAMP=`cat "$1" 2> /dev/null`
 CURRENT=`git-describe 2>/dev/null`
 
-if [[ -z "$STAMP" || -z "$CURRENT" ]]; then
-	die
+if [ -z "$STAMP" -o -z "$CURRENT" ]
+then
+     die
 fi
 
-if [ "$STAMP" != "$CURRENT" ]; then
-	echo "git version changed: $STAMP -> $CURRENT"
-	sed -e s/$STAMP/$CURRENT/g "$2" 1> "$2.new" || die
-	mv "$2.new" "$2"
-	echo -n "$CURRENT" > "$1"
+if [ "$STAMP" != "$CURRENT" ]
+then
+    echo "git version changed: $STAMP -> $CURRENT"
+    sed -e s/$STAMP/$CURRENT/g "$2" 1> "$2.new" || die
+    mv "$2.new" "$2"
+    echo -n "$CURRENT" > "$1"
 fi