Revert "crossplatform.mk: Tweak for Windows 8"
- The problem had nothing to do with Windows 8, it was a bad mingw32-make.exe that sadly slipped into the 0.44.08 Windows installer

This reverts commit a1aaf6fa7345e8702ab3df13a9bbad784472348c.
ecere/Win32 driver: Fixed lock-up on updating caption from other thread (#985)
- Could happen from a window activation, visible property...
- This solved the IDE from hanging on GDB present but failing to start
ide; (#968) silence invalid ValidateBreakpoint message.
ecere; XInterface.ec debug instrumentation.
ecere; drivers; XInterface; (#700, #757 and #795) improvements to X driver.