numrun012(ghci) now passes on Windows

I don't know why it started working, but we didn't know why it didn't work
before either.
Handles TEST_HC=c:/... on Windows
derefnull(ghci) and divbyzero(ghci) fail on Win32 in 7.4 and 7.6
Fix T7037 on Windows
Tweak a comment to help vim's syntax highlighting
dynCompileExpr(dyn) fails on Windows as ghc isn't built the dyn way
{ffi002,5402,5594}(threaded2) fail on Windows with 7.4.1 and 7.6 branch

The failure looks like:

ffi002.exe: Using large values for -N is not allowed by default.
Link with -rtsopts to allow full control.
Add expected output for T4464 on Windows
Add Windows output for shared001
5313(dyn) is broken on Windows (#5987)
conc059(threaded2) fails on Windows with 7.4.1 and 7.6 branch
concprog001(threaded2) fails on Windows with 7.4.1 and 7.6 branch
Make T7037 work on both Windows and other platforms