Implement constant loading in NeLoader

In the NeLoader, there remains a todo that is still unimplemented https://github.com/NationalSecurityAgency/ghidra/blob/f62320a50bfc481dc0c95387735afdddc71bb6f4/Ghidra/Features/Base/src/main/java/ghidra/app/util/opinion/NeLoader.java#L566-L569 Can this be looked at?

In the KERNEL.EXE & KRNL386.EXE, I know that constants __AHINCR & __AHSHIFT are exported at Ordinal_113 & Ordinal_114 (although I've conflicting information as to which is which!), but they aren't recognised and appear in red in the Symbol Tree.

Originally posted by @Wall-AF in https://github.com/NationalSecurityAgency/ghidra/issues/2233#issuecomment-1279185613