remove useless patch

this patch was incorrectly updated causing a result inversion because
the original fix is upstream now. i.e. instead of following destdir at
install time it was following it at configure time again

upstream code looks correct now so drop the patch + adjust
install_bindir to be relative so the upstream code correctly handles it
(arguably there should be handling for when BIN_INSTALL_DIR is absolute
though :|)

BUG: 445858