Use static CRT for now

[csujedihy]

Currently, the libs used in XDP functional tests are built with static CRT runtime. Cxplat has been using dynamic CRT, which causes a conflict (which I previously thought it was the other way around- cxplat using static CRT while xdp test stuff using dynamic CRT).

This allows me to get rid of /nodefaultlib hacks in XDP.

     3>LIBCMTD.lib(initializers.obj) : warning LNK4098: defaultlib 'msvcrtd.lib' conflicts with use of other libs; use /NODEFAULTLIB:library [D:\xdp-for-windows\test\functional\taef\xdpfunctionaltests.vcxproj]
     3>LINK : error LNK1218: warning treated as error; no output file generated [D:\xdp-for-windows\test\functional\taef\xdpfunctionaltests.vcxproj]
     3>Done Building Project "D:\xdp-for-windows\test\functional\taef\xdpfunctionaltests.vcxproj" (default targets) -- FAILED