Keep the copied files as writable
Keep the copied files as writable

Mac's strip tool doesn't work if the file is read-only. Some of the
libraries we copy might be read-only (like those installed by
HomeBrew) and that would cause stripping to fail.

Change-Id: Ie8caa853a26794ec97ec84354d9f7bb142cce993
Reviewed-by: Tor Arne Vestbø <455e994b14f100bcf4496f5548752c1ff193cc50@digia.com>

mer-qt/qttools,mer-qt/qttools,mer-qt/qttools,mer-qt/qttools,mer-qt/qttools,mer-qt/qttools