graphics/gdal: Fix build with OpenEXR/Imath 3.0 (should be part of...

graphics/gdal: Fix build with OpenEXR/Imath 3.0 (should be part of 9ab14902)

- Remove MAKE_JOBS_UNSAFE [1]

PR:		255216
Reported by:	O. Hartmann <ohartmann@walstatt.org>
Tested by:	John Hein <jcfyecrayz@liamekaens.com> [1]