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 lat temu
..
Makefile.in	eb72d50f44 Import gcc 5.2.0 from tarball	9 lat temu
d-demangle-expected	eb72d50f44 Import gcc 5.2.0 from tarball	9 lat temu
demangle-expected	eb72d50f44 Import gcc 5.2.0 from tarball	9 lat temu
demangler-fuzzer.c	eb72d50f44 Import gcc 5.2.0 from tarball	9 lat temu
test-demangle.c	eb72d50f44 Import gcc 5.2.0 from tarball	9 lat temu
test-expandargv.c	eb72d50f44 Import gcc 5.2.0 from tarball	9 lat temu
test-pexecute.c	eb72d50f44 Import gcc 5.2.0 from tarball	9 lat temu
test-strtol.c	eb72d50f44 Import gcc 5.2.0 from tarball	9 lat temu