Attempt to address the build size issue in Windows

[gpx1000]

by removing the .obj files once the .lib is created. Also use static libs, also change the debugger flags as necessary to improve the build size while maintaining debugability.

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Fixes #

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[SaschaWillems]

Will "rm -rf" work on windows?

[gpx1000]

no, but cmake -E rm rf tells cmake to use it's portable remove function. Thus it should work. The problem for why it didn't work was the if check above it.

[tomek-brcm]

Builds fine on Linux, no regressions