Fix building on OpenBSD when building shared libs

OpenBSD does not link shared libs against libc so it is expected
that the use of --no-undefined when linking will fail.

Also garbage collect CMAKE_VERSION check while here, as requested, since
the minimum version is already 3.14.

Update CHANGES for release 12.1.0

Update CHANGES for release 12.1.0

Update CHANGES for release 12.0.0

Update CHANGES for release 12.0.0

Merge pull request KhronosGroup#3081 from jeremy-lunarg/hayes-update-…

…changes

Update CHANGES for release 11.13.0

Merge pull request KhronosGroup#3081 from jeremy-lunarg/hayes-update-…

…changes

Update CHANGES for release 11.13.0

Fix locations of cmake files in side compat shims

In KhronosGroup#3027, the installed cmake files were
stuck into a /cmake subdir but this isn't reflected in these compatibility shims.

Merge pull request KhronosGroup#3049 from jeremy-lunarg/hayes-update-…

…changes

Update CHANGES for release 11.12.0

Merge pull request KhronosGroup#3049 from jeremy-lunarg/hayes-update-…

…changes

Update CHANGES for release 11.12.0