Rust

Add FromRaw impl for some curve points #377

Job	Run time
build-wasm	53s
check	25s
build-wasm-nostd	33s
check-all	26s
check-doc	28s
check-alloc	21s
check-changelog	3s
check-nostd	16s
check-semver (generic-ec, all-features)	2m 39s
clippy-nostd	22s
check-semver (generic-ec, only-explicit-features)	2m 38s
clippy	31s
clippy-tests	20s
check-semver (generic-ec-core, all-features)	2m 25s
check-semver (generic-ec-core, only-explicit-features)	2m 22s
fmt	5s
test	40s
check-semver (generic-ec-curves, all-features)	2m 32s
check-semver (generic-ec-curves, only-explicit-features)	2m 40s
check-semver (generic-ec-zkp, all-features)	2m 31s
check-semver (generic-ec-zkp, only-explicit-features)	2m 33s
	25m 43s

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