[PATCH] generate-configlist.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.

Signed-off-by: Richard Purdie <redacted>

Index: git-2.30.0/generate-configlist.sh
===================================================================

--- git-2.30.0.orig/generate-configlist.sh
+++ git-2.30.0/generate-configlist.sh

@@ -9,7 +9,7 @@ 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 |
 	sed 's/^.*$/	"&",/'
 	cat <<EOF
 	NULL,