host_config.h.in: fix Sleep() argument

Windows' Sleep() function expects the argument to be specified in milliseconds
[test_repeater] Fixed windows build
Cmake: fix error that caused all build versions to be labelled -dirty
Fixed detection of hotplug
Merge pull request #104 from litghost/fix_hotplug_check

Fixed detection of hotplug
Merge pull request #103 from litghost/windows_build_fix

[test_repeater] Fixed windows build
libbladeRF: call flash_firmware() with the correct buffer size

The buffer size is aligned to flash sector boundaries, this new size needs
to be propagated to flash_firmware().