Also:
- Drop upstreamed -paths patch.
- Add -bootstrap patch to break circular build dependencies.
- Add -escape, -ref, -doc, -gac, and -immutable patches.
- Add -terminal, -erroroutput, and -enterleave patches from sagemath.
- Add libgap and libgap-devel subpackages.
- Move the commandline application into the main package.
- Change BRs and Rs due to recent TeXLive packaging changes.
- Create all of the icon sizes supported by hicolor-icon-theme.
- Fix update-gap-workspace on initial build with empty workspace.
- Disable hardened build, which breaks RTLD_LAZY in the module loader.
- Build in bootstrap mode.
