[Patch, RFC] git_update_version.py: Support vendor-branch version bumps (was: [RFC] Enable automatic ChangeLog updates on devel/omp/gcc-15 branch)

Hi Sandra, hello world, Sandra Loosemore wrote: I have created the devel/omp/gcc-15 (aka "OG15") branch, ... For previous branches we'd been using ChangeLog.omp files paralleling the normal ChangeLog files, that were updated manually and committed with the corresponding patch.  In preparing

[RFC] Enable automatic ChangeLog updates on devel/omp/gcc-15 branch

I have created the devel/omp/gcc-15 (aka "OG15") branch, but not yet populated it with patches carried over from devel/omp/gcc-14. These development branches are where we put bleeding-edge versions of OpenMP and OpenACC features. For previous branches we'd been using ChangeLog.omp files paral