Fix build on 8.x, by leveraging USE_BINUTILS=yes there (before 900033).
The older binutils are picky and error out when trying to strip .a
files, the newer binutils just skip over things and print warnings. [1]

Fix build with WITH_SSP[_PORTS]=yes, by not running together LDFLAGS
expansions; this drops one hunk from files/patch-configure.in.

Modernize USE_PYTHON and @unexec rmdir.

PR: 192047 [1]
Submitted by: feld@ [1], Janos Dohanics [1, to ports@]