Completely disable distcheck
Completely disable distcheck

This is a temporary measure to expedite the 1.3 beta, which besides
a single non-vital test failure on the dist builders have already
been validated.

This will be reverted for the next beta.

vhbit/rust,vhbit/rust,vhbit/rust,vhbit/rust,vhbit/rust,vhbit/rust,vhbit/rust,vhbit/rust