bin/get-fixes-pick-list.sh: parse just the commit message

We were parsing the whole diff, although the candidates were
identified only by the commit message.

Now, we only use the commit message for parsing.

Signed-off-by: Andres Gomez <agomez@igalia.com>
Reviewed-by: Emil Velikov <emli.velikov@collabora.com>

bin/get-fixes-pick-list.sh

@@ -37,10 +37,10 @@ do
 	fi
 
 	# For each one try to extract the tag
-	fixes_count=`git show $sha | grep -i "fixes:" | wc -l`
+	fixes_count=`git show -s $sha | grep -i "fixes:" | wc -l`
 	warn=`(test $fixes_count -gt 1 && echo $fixes_count) || echo 0`
 	while [ $fixes_count -gt 0 ] ; do
-		fixes=`git show $sha | grep -i "fixes:" | tail -n $fixes_count`
+		fixes=`git show -s $sha | grep -i "fixes:" | tail -n $fixes_count`
 		fixes_count=$(($fixes_count-1))
 		# The following sed/cut combination is borrowed from GregKH
 		id=`echo ${fixes} | sed -e 's/^[ \t]*//' | cut -f 2 -d ':' | sed -e 's/^[ \t]*//' | cut -f 1 -d ' '`