Instead of building regular Bash using regular Gash, we now build
minimal Bash using the bootstrap build inputs, with bootstrap Bash
replaced by bootstrap Gash.
* tests/bootstrap/bash-without-bash.scm (gash-with-links): Rename this...
(%bootstrap-gash): ...to this, and use nothing but the bootstrap Guile
to build and run it.
(%bootstrap-coreutils&co-without-bash): New variable.
(%bootstrap-coreutils&co?): New function.
(%boot0-inputs): New variable.
gash/environment.scm: Remove file.
geesh/*: Move these files into the 'gash' folder and replace all
instances of the word 'geesh'.
scripts/geesh.in: Remove file.
HACKING, INSTALL, Makefile.am, configure.ac, guix.scm,
tests/bootstrap/bash-without-bash.scm, tests/spec/Makefile.am,
tests/spec/check-spec, tests/spec/oil.scm, tests/unit/*,
tools/coverage.in: Replace all instances of the word 'geesh'.
Co-authored-by: Jan Nieuwenhuizen <janneke@gnu.org>