tomteb/carbon-lang: == Clone of https://github.com/carbon-language/carbon-lang.git == @ 80639a02f062bdfe27a5b9b5b5bf2478a088aabc

Strom: 80639a02f0

Richard Smith 31919afa24 Allow conversion between `T` and `Cpp.void`. (#6575)		3 mesiacov pred
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BUILD	444c18dfa3 Enable using our own C++ runtimes across the board (#6549)	4 mesiacov pred
hello_world.carbon	31919afa24 Allow conversion between `T` and `Cpp.void`. (#6575)	3 mesiacov pred