webkit2gtk: add patch to resolve unintended gst-plugins-bad1 dependency

[averycoolbean]

Testing the changes

• I tested the changes in this PR:NO

Local build testing

• I built this PR locally for my native architecture, (amd64-glibc)

this would properly resolve issue #34781 by applying the final fix already included in webkitgtk versions 2.36.4 and up

full credit for the fix goes to Philippe Normand here, i just copy-pasted it onto this older version to generate a fitting patch

@q66 you asked to be pinged before touching this package

[averycoolbean]

saved as a draft cause i made a really silly mistake while generating the original patch file (kinda sorta missed an entire other file), ill commit the proper patch once ive built the package again to confirm it still builds without issue

[q66]

i will update webkitgtk to 2.36 later

that said, gst-plugins-bad should be a build dependency anyway because it enables functionality otherwise not available