bsd: remove the Cgo / C-toolchain dependency (pure-Go X11) (#55) #234

Job	Run time
platform_test (macos-latest, 1.24.x)	36s
wayland_test	44s
freebsd_build	1m 7s
platform_test (ubuntu-latest, 1.24.x)	55s
platform_test (windows-latest, 1.24.x)	1m 0s
openbsd_build	1m 46s
windows_386_build	59s
	7m 7s

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