[gcc/ibuclaw/heads/mingw] (14 commits) Initial Mingw/MSVC support

[gcc/ibuclaw/heads/mingw] (14 commits) Initial Mingw/MSVC support

[Iain Buclaw]

The branch 'ibuclaw/heads/mingw' was updated to point to:

 4e6d9e196c4... Initial Mingw/MSVC support

It previously pointed to:

 75cf7d9dcae... Questionable fix (fgetwc is defined in C library, and this 

Diff:

!!! WARNING: THE FOLLOWING COMMITS ARE NO LONGER ACCESSIBLE (LOST):
-------------------------------------------------------------------

  75cf7d9... Questionable fix (fgetwc is defined in C library, and this 
  6b0902d... Move MinGW inside CRuntime_Microsoft version block
  7dbd2ea... Fix hello world with std.stdio
  d79a6ea... Initial Mingw/MSVC support


Summary of changes (added commits):
-----------------------------------

  4e6d9e1... Initial Mingw/MSVC support
  5cebea3... Sync druntime
  550ec1b... libphobos: Add Thread/Fiber support code for Darwin
  d922556... libphobos: Add D runtime support code for MinGW
  cf73e5a... libphobos: Add section support code for OpenBSD
  714bdc3... aarch64: Fix up 2 other combine opt regressions vs. GCC8 [P (*)
  2f422b5... preprocessor/100142  - revert unwanted change in last commi (*)
  3395dfc... [OpenACC 'kernels'] '-fopenacc-kernels=[...]' -> '--param=o (*)
  15cfa8d... libstdc++: Update some baseline_symbols.txt (x32) (*)
  fde4a87... Align decl and def arguments. (*)
  0bb37e8... Fix another -freorder-blocks-and-partition glitch with Wind (*)
  d64720a... Daily bump. (*)
  b412ce8... combine: Don't create REG_UNUSED notes if the reg already d (*)
  da946b4... Daily bump. (*)

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    Because the reference `refs/users/ibuclaw/heads/mingw' matches
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