r10576: Add testprog for named pipes. Also add GNUmakefile's for cross-compilation
using mingw32
(This used to be commit 30ba8fdc3dc8dba543686591a27b819b8f9444db)
- [DH] testprogs/win32/testmailslot/GNUmakefile
- [DH] testprogs/win32/testmailslot/NMakefile