SCRIPTS: make git-show-backports also dump a "git show" command

This is very convenient for backport reviews as in a single
command you get all the patches one at a time with their
changelog and backport instructions.
diff --git a/scripts/git-show-backports b/scripts/git-show-backports
index cbe40bb..6567b2f 100755
--- a/scripts/git-show-backports
+++ b/scripts/git-show-backports
@@ -227,10 +227,12 @@
 		echo "No missing commit to apply."
 	elif [ -n "$MISSING" ]; then
 		echo
-		echo "In order to apply all leftmost commits to current branch :"
+		echo "In order to show and/or apply all leftmost commits to current branch :"
+		echo "   git show ${left_commits[@]}"
 		echo "   git cherry-pick -x ${left_commits[@]}"
 		echo
-		echo "In order to apply all rightmost commits to current branch :"
+		echo "In order to show and/or apply all rightmost commits to current branch :"
+		echo "   git show ${right_commits[@]}"
 		echo "   git cherry-pick -x ${right_commits[@]}"
 	fi
 )