* bootstrap/Makefile.am (.scm.go): Fix -L options to point to /module.
(SOURCES): Move up psyntax-pp.scm. Sadly a bug while I was developing
the bootstrap makefile meant that there was a stale psyntax-pp.go from
module/ that the build was picking up, leading to invalid
bootstrap timing measurements.
This reduces total build time to around 30 minutes or so.
* Makefile.am (SUBDIRS): Visit bootstrap/ before module/.
* bootstrap/Makefile.am: New file.
* configure.ac: Generate bootstrap/Makefile.
* meta/uninstalled-env.in (top_builddir): Add bootstrap/ to the
GUILE_LOAD_COMPILED_PATH.
* module/Makefile.am: Simplify to just sort files in alphabetical order;
since bootstrap/ was already compiled, we don't need to try to
optimize compilation order. Although the compiler will get faster as
more of the compiler itself is optimized, this isn't a significant
enough effect to worry about.