Disconnect ar from cc on OpenBSD
Disconnect ar from cc on OpenBSD

OpenBSD usually use an alternative compiler (`egcc') from ports. But the
`ar' is unprefixed as it comes from base.

GBGamer/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,GBGamer/rust,aidancully/rust,graydon/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,graydon/rust,graydon/rust,GBGamer/rust,GBGamer/rust,GBGamer/rust,GBGamer/rust,aidancully/rust,graydon/rust