Support new cabal versions

[harendra-kumar]

New version (CABALVER=3.10.2.0) writes cabal config at .config/cabal/config instead of .cabal.config.

--------------------------------------------------
[1 sec] Build tools: package level and global configuration
--------------------------------------------------
Using user specified cabal project file at [cabal.project.ci]
Using cabal command [cabal --project-file=cabal.project.ci]
Using sdist cabal command [cabal --project-file=cabal.project.ci]
Removing old cabal config [/root/.cabal/config]
rm -f /root/.cabal/config
cabal user-config init
Writing default configuration to /root/.config/cabal/config
Error: cabal config file [/root/.cabal/config] not found.

Exited with code exit status 1

This problem occurs only when CABAL_HACKAGE_MIRROR is set.

[harendra-kumar]

Linked the old location with the new in #76 .