The jenkins autotools build has never worked because we try to
build against uninstalled versions of the opus and ogg libraries,
whose pkg-config files export a static library. This works fine
for executables, but libtool seemingly can't link a dynamic library
against a static library.

We could change the -uninstalled.pc files to reference the libtool
versions of the libraries, but that breaks the unix makefile builds,
which of course don't use libtool.

As a work around, write out our own versions of the pc files and
use those to reference the file we need.

Also sets -x on both continuous integration scripts so it's more
clear what steps are being applied.