FortranCInterface: Improve Windows support
This MR improves the Windows support of FortranCInterface in the following ways:
- PGI works now properly.
- The FortranCInterface project receives the
RELEASE
flags from the parent. Previously, if you wanted to use/MT
for C++ and/libs:static
with Intel Fortran, this broke the test because the latter argument is in theFLAGS
variable, whereas/MT
would be specified in the configuration specific variable.