[commit: ghc] wip/T8545-ghc-7.8's head updated: Convert all sub-repos into proper submodules (re #8545) (25c5f2e)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

Branch 'wip/T8545-ghc-7.8' now includes:

     999fdb0 Switch to relative URLs in .gitmodules
     b20e946 Correctly clone submodules from github
     cf54407 Make sync-all handle all github protocols correctly
     282f361 Also allow http://github.com (#8824)
     25c5f2e Convert all sub-repos into proper submodules (re #8545)