ninja: Update to version 1.12.1

ninja: Update to version 1.12.1

- Update from version 1.11.1 to 1.12.1
- Update of rootfile not required
- Changelog
    1.12.1
	Bugfixes:
	    Screen updates extremely slow on Windows #2435
	    Dry run error if the build directory does not exist #2431
	    New critical path scheduler performance improvements #2443
    1.12.0
	    Critical path scheduler which orders the jobs by their runtime history #2177
	     This may break your build if you haven't specified your dependencies
	     correctly.
	    Resiliency against inputs changing during the build #1943
	    Reliable ETA and progress percentage in status #1963
	    Support for path lengths over 260 characters on Windows #1900
	    ARM binaries are now available for Windows and Linux, too
	    Several bugfixes

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>