winedump: Fix the output for Makefile.in with respect to the dependencies line to match that required by the build system.

Move the checks for float texture formats into the correct location.
This allows some Direct3D sample applications which check for any of
the float formats together with D3DUSAGE_RENDERTARGET to start.

wined3d: Ensure all states affected by a change in render_offscreen are marked dirty in ActivateContext.