[PATCH] generate-cmdlist.sh: Fix determinism issue

Currently git binaries are not entirely reproducible, at least partly 
due to config-list.h differing in order depending on the system's
locale settings. Under different locales, the entries:

"sendemail.identity",
"sendemail.<identity>.*",

would differ in order for example and this leads to differences in 
the debug symbols for the binaries.

This can be fixed by specifying the C locale for the sort in the
shell script generating the header.

Note: This is a backport of Richard Purdie's original patch for a more
recent version of git. The offending code in this older version is
in generate-cmdlist.sh. The upstream current version has this code
in generate-configlist.sh.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Upstream-Status: Submitted [https://public-inbox.org/git/f029a942dd3d50d85e60bd37d8e454524987842f.camel@linuxfoundation.org/T/#u]

index 71158f7..c137091 100755
--- a/generate-cmdlist.sh
+++ b/generate-cmdlist.sh
@@ -82,7 +82,7 @@ static const char *config_name_list[] = {
 EOF
 	grep -h '^[a-zA-Z].*\..*::$' Documentation/*config.txt Documentation/config/*.txt |
 	sed '/deprecated/d; s/::$//; s/,  */\n/g' |
-	sort |
+	LC_ALL=C sort |
 	while read line
 	do
 		echo "	\"$line\","