Build

Fixed linking of _rmt_(Bind|Unbind)Metal when including from Obj-C++ #147

Job	Run time
build-android (android, armv7, release, 21)	37s
build-windows (windows, x86, debug, 14.3)	16s
build-android (android, arm64, release, 21)	46s
build-linux (linux, x86)	25s
build-windows (windows, x86, debug, 14.2)	22s
build-macos (linux, x64, release)	14s
build-linux (linux, x64)	30s
build-windows (windows, x86, debug, 14.1)	15s
build-windows (windows, x86, release, 14.3)	16s
build-windows (windows, x86, release, 14.2)	22s
build-windows (windows, x86, release, 14.1)	17s
build-windows (windows, x64, debug, 14.3)	16s
build-windows (windows, x64, debug, 14.2)	24s
build-windows (windows, x64, debug, 14.1)	16s
build-windows (windows, x64, release, 14.3)	15s
build-windows (windows, x64, release, 14.2)	23s
build-windows (windows, x64, release, 14.1)	17s
	6m 11s

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