* Adding a test for issue #1326 to check that ghwdump doesn't crash with a zero-length signal.
* Remove an assertion from ghwlib that prevents zero-length signals.
* msys2: work around makepkg hanging at the end of build()
* ci: update actions/checkout to v2
* make: allow setting default description through GHDL_DESC
* ci: ensure clean git describe on MSYS2