Issue with Build and Build Check

[rickyefarr]

This issue is extremely similar to the one found in flint at https://github.com/wbhart/flint2/issues/330

touch: cannot touch ‘test/t-.c’: No such file or directory touch: cannot touch ‘hypgeom/test/t-.c’: No such file or directory make[1]: Leaving directory `/home/therickaman/libs/arb/arb'

Creating the directories fixes the issue, but then causes the tests to fail.