devel/woff2: Improve port and import patches

• Import Coverity Scan patch from Fedora
• Disable RPATH
• Backport upstream commit 3831354113db8803fb1f5ba196cf0bbb537578dd
• Add USES= pathfix and pkgconfig

References:
https://src.fedoraproject.org/rpms/woff2/blob/rawhide/f/covscan.patch
https://github.com/google/woff2/commit/3831354113db8803fb1f5ba196cf0bbb537578dd

PR: 273510
Approved by: portmgr (maintainer timeout, 2+ weeks)
Sponsored by: Blinkinblox