Fix flags for Intel Fortran on Windows

We replace "/MD" with ifort-specific flags as follows:

  /MD  -> /threads /libs:dll
  /MDd -> /threads /libs:dll /dbglibs

We also enable the "/MD" equivalent for all Fortran configurations.
Previously multithreaded dll runtimes were used for release builds and
threaded static runtimes for debug builds.  For mixed Fortran C/C++
projects, this led to link warnings for Debug but not for Release.

See issue #8744.

Modules/Platform/Windows-ifort.cmake

@@ -53,10 +53,10 @@ ENDIF(CMAKE_GENERATOR MATCHES "Visual Studio 7" OR CMAKE_GENERATOR MATCHES "Visu
 # does the compiler support pdbtype and is it the newer compiler
 
 SET(CMAKE_BUILD_TYPE_INIT Debug)
-SET (CMAKE_Fortran_FLAGS_INIT "/W1 /nologo /fpp")
-SET (CMAKE_Fortran_FLAGS_DEBUG_INIT "/debug:full")
+SET (CMAKE_Fortran_FLAGS_INIT "/W1 /nologo /fpp /libs:dll /threads")
+SET (CMAKE_Fortran_FLAGS_DEBUG_INIT "/debug:full /dbglibs")
 SET (CMAKE_Fortran_FLAGS_MINSIZEREL_INIT "/O2 /D NDEBUG")
-SET (CMAKE_Fortran_FLAGS_RELEASE_INIT "/MD /O1 /D NDEBUG")
+SET (CMAKE_Fortran_FLAGS_RELEASE_INIT "/O1 /D NDEBUG")
 SET (CMAKE_Fortran_FLAGS_RELWITHDEBINFO_INIT "/O1 /debug:full /D NDEBUG")
 
 SET (CMAKE_Fortran_STANDARD_LIBRARIES_INIT "user32.lib")