[commit: ghc] wip/aarch64-regd's head updated: WIP arm64 ghci (1b931af)

[git at git.haskell.org]

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

Branch 'wip/aarch64-regd' now includes:

     5dc3db7 Switch to LLVM version 3.7
     80602af Revert "Switch to LLVM version 3.7"
     e331392 Fix error msg: ghci can't be used with -prof or -static (#10936)
     5d84110 Add short library names support to Windows linker
     182c44d Keep `shift{L,R}` on `Integer` from segfaulting
     840df33 Rename SpecInfo to RuleInfo (upon SPJ's advice).
     fa5eabe sphinx: Don't share doctrees between targets
     614ce4b Testsuite: T3333 still fails on non-linux statically linked ghci (#3333)
     bbad4f6 Delete ShPackageKey for now.
     f002340 compiler/nativeGen/PPC/Ppr.hs: Whitespace
     4bd58c1 PPC: Fix right shift by 32 bits #10870
     8e7c761 Switch to LLVM version 3.7
     cc4522d rts: Fix clobbered regs list for aarch64 StgRun
     762730f configure.ac: AArch64 is now registerised
     1b931af WIP arm64 ghci