gnupload: Support -h

[Ben Elliston]

The first time I ran gnupload, I used -h and got an error. ;-) This
patch adds -h as an alias for --help.

Cheers, Ben

2018-11-28  Ben Elliston  <b...@gnu.org>

        * build-aux/gnupload: Support -h.

diff --git a/build-aux/gnupload b/build-aux/gnupload
index 37d7b6806..a2856fe6b 100755
--- a/build-aux/gnupload
+++ b/build-aux/gnupload
@@ -148,7 +148,7 @@ while test -n "$1"; do
   -*)
     collect_var=
     case $1 in
-    --help)
+    -h | --help)
       echo "$usage"
       exit $?
       ;;

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