[commit: ghc] wip/T8545-ghc-7.8's head updated: Convert all sub-repos into proper submodules (re #8545) (830f231)

[git at git.haskell.org]

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

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

     8ea3d18 Simplify handling of the interactive package; fixes Trac #8831
     878dee3 Trac #8831 is fixed
     935dc72 Fix the treatment of lexically scoped kind variables (Trac #8856)
     b95b3fb Test Trac #8856
     924f749 Unflatten the constraints of an inferred types (Trac #8889)
     85bc454 Test Trac #8889
     632956d Make sure we occurrence-analyse unfoldings (fixes Trac #8892)
     c63af7a Apply the kind subst to the (kinds of the) quanitifed tyvars in deriveTyData
     11d3f6b Test Trac #8893
     46cfa8e Revert "Fix #8745 - GND is now -XSafe compatible."
     0e3a551 Follow hs_popcntX changes in ghc-prim
     bca03d9 Enable popcnt test now when segfault is fixed
     a617888 Revert "change deriveConstants to use nm in a POSIX way (fixes #8781)"
     830f231 Convert all sub-repos into proper submodules (re #8545)