makepkg: fix a GNU-ism in awk usage

A non-GNU version of awk may not support the (|...) syntax for
an optional group and require '()' to match an empty string.
The (...)? syntax is more appropriate for this usage.

Signed-off-by: Rémy Oudompheng <remy@archlinux.org>
Signed-off-by: Allan McRae <allan@archlinux.org>
Signed-off-by: Dan McGee <dan@archlinux.org>

0 files changed, 0 insertions, 0 deletions