Convert ports which use USE_GL=linux to USE_LINUX_APPS+=dri.
This is needed to switch a default linux base at 8-CURRENT
to linux_base-f10. No PORTREVISION bump is needed since
it's a mere infrastructure fix. Affected ports:
Note: no more ports are using USE_GL=linux, it may be removed
Approved by: maintainer timeout (2 months, the needed changes were submitted
to emulation@ at 2009-04-09)