- Prune invalid-license rpmlint warnings, the SLE12 codestream
doesn't get fixed but FF applies there, too.

- Update to gcc-12 branch head, e927d1cf141f221c5a32574bde0, git416
* includes GCC 12.2 release
* includes recent fixes backported from trunk

- Add gcc12-fifo-jobserver-support.patch that adds support
for FIFO jobserver for make.

- Allow cross-pru-gcc12-bootstrap for armv7l architecture.
PRU architecture is used for real-time MCUs embedded into TI
armv7l and aarch64 SoCs. We need to have cross-pru-gcc12 for
armv7l in order to build both host applications and PRU firmware
during the same build.