nnesse/minwin-gcc-5-2: A patched gcc 5.2 enabling a new 'minwin' target that does not link to the Microsoft C library.

Niels Nesse eb72d50f44 Import gcc 5.2.0 from tarball		9 anni fa
..
libcaf.h	eb72d50f44 Import gcc 5.2.0 from tarball	9 anni fa
mpi.c	eb72d50f44 Import gcc 5.2.0 from tarball	9 anni fa
single.c	eb72d50f44 Import gcc 5.2.0 from tarball	9 anni fa