Don't rely on a bash-specific syntax in a /bin/sh script.

POSIX shell doesn't support this sort of path expansion.

Signed-off-by: Andrew Shadura <andrew.shadura@collabora.co.uk>
Reviewed-by: Denis Pynkin <denis.pynkin@collabora.com>
Differential Revision: https://phabricator.apertis.org/D7448