graphics/darktable: Fix OpenEXR detection

The patch comes from upstream:
https://github.com/darktable-org/darktable/pull/8775

It didn't make it to a release yet.

The package revision is bumped because the build succeeds but darktable
failed to run with the following error:

$ darktable --version
ld-elf.so.1: /usr/local/bin/../lib/darktable/libdarktable.so: Undefined symbol "_ZTIN7Imf_3_09AttributeE"

With the patch:

$ darktable --version
this is darktable 3.4.1
...

PR: 255254
Reported by: Ludger Bolmerg <lbolmerg@posteo.de>,

		Felix Palmen <felix@palmen-it.de>,
		a.parseg@gmail.com

Obtained from: https://github.com/darktable-org/darktable/pull/8775