john-jumbo 1.8.0-j1

Version bump. Changed how we handle this, to reflect upstream’s new release priorities and move to autotools. Removed a redundant part of the patch.
Just to check, something like `system "make", "-s", "CC=#{ENV.cc}", "CFLAGS='-DJOHN_SYSTEMWIDE=1 -DJOHN_SYSTEMWIDE_EXEC=#{foo}'"` didn't seem to change the behavior of the built `john`?