Do not include unnecessary files in build

[mikedn]

Some files have their contents ifdefed out because some CLR features are not present (and they'll probably never be) in CoreCLR. A few others are DAC and/or arch specific so they have been moved to the appropiate file lists.

[jkotas]

This highlighted a mismatch between the old msbuild-based scripts and CMakefiles. This should be left in and FEATURE_LAZYCOW defined for x86 and arm instead (on Windows at least) - to match https://github.com/dotnet/coreclr/blob/master/clr.coreclr.props#L68.

[jkotas]

Looks good to me otherwise.

[mikedn]

Thanks, I restored lazycow.cpp (and enabled the feature) and cleaned up a few more files.

Do you know what's up with genericstackprobe.cpp (FEATURE_STACK_PROBE)? Doesn't seem to be used.

[jkotas]

FEATURE_STACK_PROBE has been always off for CoreCLR.

[mikedn]

OK, remove genericstackprobe.cpp as well. I've left in the following:

• vm\interpreter.cpp (maybe someone wants to play with it)
• vm\mdassistants.cpp (don't know why it's disabled, seems like a useful feature to have)
• vm\prestub.cpp (somewhat convoluted condition)
• vm\prof*.cpp (AFAIK profiler support will be enabled at some point)
• vm\umthunkhash.cpp (C++/CLI I presume, unlikely to see this in CoreCLR but I know people asked about it)
• vm\typeequivalencehash.cpp (COM PIA?)
• vm\gccover.cpp, dbggcinfoencoder.cpp, perfmap.cpp (debugging stuff, presumably useful to have around)
• utilcode\perflog.cpp (debugging stuff enabled only for 32 bit builds, unclear what stops it from being enabled on 64 bit builds as well)

and disabled LNK4221 for static libraries (it was wrongly disabled for dlls).

Fixes #2252

[mikedn]

Removed umthunkhash.cpp/typeequivalencehash.cpp and squashed. I also rebased against master, maybe the build will stop failing after you disabled those tests.