Update to 0.12 (older version's distfile couldn't be found): Fix ABI vers.;
+LICENSE; buildlink pthread; legacy math include in PLIST; works as older
version;
Set BUILDLINK_DEPMETHOD.xcb-proto=build instead of adding it to
BUILD_DEPENDS. Bump PKGREVISION.
Use wget to FETCH. ftp can't follow primary link and DDL is 403'd. Bump
PKGREVISION.