New review comment by ahesford on void-packages repository

https://github.com/void-linux/void-packages/pull/27996#discussion_r560256424

Comment:
Anything that links against shared libraries in `/opt/vc/lib` has to set rpath or the linker will not be able to satisfy these dependencies at runtime. Earlier versions of `rpi-userland` shipped with configurations that modified the dynamic linker search paths to avoid this problem, but that is generally the wrong thing to do on musl (because it will clobber any custom configuration added by users) so I dropped it in favor of rpath entries in affected binaries. Thus, unless the `gst-omx` build system sets the rpath as necessary on its own, dropping the `$LDFLAGS` assignment here is bound to cause more breakage, not less.