Remove CPACK_BUILD_CONFIG from package name

[LegalizeAdulthood]

This isn't a predefined CMake or CPack variabe and isn't set anywhere in the CMake scripts.

[pmetzger]

Committed on my ZIMH hard fork in pmetzger/zimh@fd0fc004

[LegalizeAdulthood]

Apparently this is undocumented as mentioned here, but if you specify -C to inform CPack of a configuration, then this variable will be set to that. So theoretically, there could be a Debug package and a Release package.

So perhaps a "better" change would be to only append the value of this variable to the list if it is non-empty.

When I was building packages, because I didn't run CPack manually with -C, the variable was empty and I got a package name with an extra - in it.

[LegalizeAdulthood]

I'll update my PR to append the variable only if non-empty.

[pmetzger]

I dunno. I think it's not a great idea to rely on undocumented CPack behavior? Makes me pretty uncomfortable.

[LegalizeAdulthood]

Since I didn't contribute the entirety of the CMake build scripts, I'm trying to make changes consistent with the original intent.