makepkg: Set the working copy destination explicitly when cloning in extract_git

This fixes the issue where if the user explicitly set the name of the cloned source
to eg. foo.git, the directory name in $SRCDEST would be foo.git as expected, but the
clone in $srcdir would be stripped of the .git suffix.

Signed-off-by: Lukáš Jirkovský <l.jirkovsky@gmail.com>
Signed-off-by: Allan McRae <allan@archlinux.org>

scripts/makepkg.sh.in

@@ -605,7 +605,7 @@ extract_git() {
 			exit 1
 		fi
 		cd_safe "$srcdir"
-	elif ! git clone "$dir"; then
+	elif ! git clone "$dir" "${dir##*/}"; then
 		error "$(gettext "Failure while creating working copy of %s %s repo")" "${repo}" "git"
 		plain "$(gettext "Aborting...")"
 		exit 1