package/pipewire: bump to version 0.3.40

- Drop patches (already in version)
- This bump will fix build failures on ARM
- This bump will fix build failures with old glibc thanks to
  https://gitlab.freedesktop.org/pipewire/pipewire/-/commit/e1671236671afbf7719b3ef29039ec4ac5102347

https://gitlab.freedesktop.org/pipewire/pipewire/-/tags/0.3.40

Fixes:
 - http://autobuild.buildroot.org/results/faec4ea02f4a6ddf44d54d5784d9de866c2d8a1f
 - http://autobuild.buildroot.org/results/31014558b6ad72e0f602095c423d48219dd6ebfa



Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>