It looks like that whole "Fixing Travis's git clone" code was just
there to make the "git describe --tags" work. I simply removed both.
Signed-off-by: Clifford Wolf <clifford@clifford.at>
* Move the code into scripts inside .travis directory.
* Build on multiple compiler versions.
Fixes#442 - Make travis build pass
Fixes#441 - Fix git version information on travis build
Fixes#440 - Make travis cache the iverilog build