media-gfx/openexr_viewers: fix Cg libdir

media-gfx/openexr_viewers: fix Cg libdir

* remove files/openexr_viewers-2.3.0-fix-cg-libdir.patch
* add files/openexr_viewers-2.3.0--with-cg-libdir.patch

Addresses an issue, where Cg libraries where not found on 32-bit
arches. The patch adds an option --with-cg-libdir to configure to
pass 32-/64-bit specific libraries of Cg to configure script.

Thanks to Arfrever Frehtes Taifersar Arahesis for reporting the issue.

See also
https://github.com/gentoo/gentoo/pull/10030#pullrequestreview-164522412

Closes: https://bugs.gentoo.org/668754
Signed-off-by: Bernd Waibel <waebbl@gmail.com>
Package-Manager: Portage-2.3.51, Repoman-2.3.11
Closes: https://github.com/gentoo/gentoo/pull/10172
Signed-off-by: Andreas Sturmlechner <asturm@gentoo.org>