func go/build.safeCgoName

4 uses

	go/build (current package)
		build.go#L1800: 		return str, safeCgoName(str)
		build.go#L1804: 		ok = ok && (chunk == "" || safeCgoName(chunk))
		build.go#L1806: 	ok = ok && (srcdir == "" || safeCgoName(srcdir))
		build.go#L1851: func safeCgoName(s string) bool {