Parse q3map_sunExt in OpenGL1 too

Used for drawing sun, which is supported by both OpenGL1 and OpenGL2.
OpenGL2 already parses it.
Merge remote-tracking branch 'ioquake3/master'

Conflicts:
	code/renderergl1/tr_shader.c

Note, Spearmint always skips extra tokens at end of line
so doesn't need to skip two extra tokens for q3map_sunExt
specifically. It would cause next line to be skipped.