gz-msgs-build

It's used at build time in 4 crates.

Depender (with downloads and own rev deps)			gz-msgs-build version
		gz-msgs10	build	^0.2.0
		gz-msgs8	build	^0.2.0
		gz-msgs9	build	^0.2.0
	2	gz-msgs	optional build	=0.7.4