RTS : Fix StgRun for aarch64-linux (#9935).
RTS : Fix StgRun for aarch64-linux (#9935).

Summary:
The GCC assembler doesn't seem to recognise the 'fp' and 'lr' register
names which are aliases for 'x29' and 'x30' respectively.

Depends on D598.

Test Plan: validate

Reviewers: lukexi, bgamari, austin

Reviewed By: austin

Subscribers: carter, thomie

Differential Revision: https://phabricator.haskell.org/D599

GHC Trac Issues: #9935

TomMD/ghc,nkaretnikov/ghc,siddhanathan/ghc,urbanslug/ghc,ghc-android/ghc,tjakway/ghcjvm,sdiehl/ghc,siddhanathan/ghc,AlexanderPankiv/ghc,acowley/ghc,AlexanderPankiv/ghc,anton-dessiatov/ghc,mfine/ghc,nushio3/ghc,sgillespie/ghc,christiaanb/ghc,TomMD/ghc,vTurbine/ghc,snoyberg/ghc,siddhanathan/ghc,snoyberg/ghc,AlexanderPankiv/ghc,fmthoma/ghc,nushio3/ghc,oldmanmike/ghc,olsner/ghc,fmthoma/ghc,wxwxwwxxx/ghc,gcampax/ghc,fmthoma/ghc,mettekou/ghc,da-x/ghc,shlevy/ghc,sdiehl/ghc,anton-dessiatov/ghc,snoyberg/ghc,vikraman/ghc,oldmanmike/ghc,olsner/ghc,sgillespie/ghc,mcschroeder/ghc,siddhanathan/ghc,gridaphobe/ghc,vikraman/ghc,fmthoma/ghc,gcampax/ghc,ml9951/ghc,wxwxwwxxx/ghc,ghc-android/ghc,mcschroeder/ghc,mfine/ghc,shlevy/ghc,sdiehl/ghc,tjakway/ghcjvm,TomMD/ghc,christiaanb/ghc,urbanslug/ghc,snoyberg/ghc,ml9951/ghc,GaloisInc/halvm-ghc,GaloisInc/halvm-ghc,shlevy/ghc,fmthoma/ghc,vikraman/ghc,ezyang/ghc,AlexanderPankiv/ghc,vikraman/ghc,urbanslug/ghc,ezyang/ghc,ghc-android/ghc,GaloisInc/halvm-ghc,nkaretnikov/ghc,shlevy/ghc,ghc-android/ghc,elieux/ghc,snoyberg/ghc,acowley/ghc,nkaretnikov/ghc,gridaphobe/ghc,mfine/ghc,TomMD/ghc,elieux/ghc,mettekou/ghc,gcampax/ghc,mfine/ghc,mettekou/ghc,mfine/ghc,nkaretnikov/ghc,elieux/ghc,mettekou/ghc,mettekou/ghc,oldmanmike/ghc,sgillespie/ghc,elieux/ghc,snoyberg/ghc,fmthoma/ghc,sdiehl/ghc,anton-dessiatov/ghc,da-x/ghc,sgillespie/ghc,nushio3/ghc,acowley/ghc,gcampax/ghc,nkaretnikov/ghc,olsner/ghc,gridaphobe/ghc,tjakway/ghcjvm,anton-dessiatov/ghc,olsner/ghc,acowley/ghc,gcampax/ghc,acowley/ghc,christiaanb/ghc,mettekou/ghc,urbanslug/ghc,vTurbine/ghc,sdiehl/ghc,christiaanb/ghc,gridaphobe/ghc,AlexanderPankiv/ghc,oldmanmike/ghc,vikraman/ghc,shlevy/ghc,shlevy/ghc,da-x/ghc,GaloisInc/halvm-ghc,GaloisInc/halvm-ghc,siddhanathan/ghc,wxwxwwxxx/ghc,christiaanb/ghc,sgillespie/ghc,christiaanb/ghc,vTurbine/ghc,gcampax/ghc,ezyang/ghc,GaloisInc/halvm-ghc,oldmanmike/ghc,elieux/ghc,mcschroeder/ghc,mcschroeder/ghc,ghc-android/ghc,tjakway/ghcjvm,nushio3/ghc,tjakway/ghcjvm,nkaretnikov/ghc,vTurbine/ghc,ml9951/ghc,urbanslug/ghc,wxwxwwxxx/ghc,ezyang/ghc,sdiehl/ghc,mettekou/ghc,nushio3/ghc,mfine/ghc,ml9951/ghc,wxwxwwxxx/ghc,anton-dessiatov/ghc,ghc-android/ghc,anton-dessiatov/ghc,da-x/ghc,fmthoma/ghc,sgillespie/ghc,mcschroeder/ghc,elieux/ghc,mcschroeder/ghc,nushio3/ghc,da-x/ghc,oldmanmike/ghc,siddhanathan/ghc,gridaphobe/ghc,tjakway/ghcjvm,da-x/ghc,vikraman/ghc,AlexanderPankiv/ghc,elieux/ghc,vTurbine/ghc,ml9951/ghc,TomMD/ghc,ezyang/ghc,christiaanb/ghc,nkaretnikov/ghc,wxwxwwxxx/ghc,urbanslug/ghc,gridaphobe/ghc,olsner/ghc,urbanslug/ghc,gcampax/ghc,acowley/ghc,nushio3/ghc,ml9951/ghc,GaloisInc/halvm-ghc,ml9951/ghc,ml9951/ghc,oldmanmike/ghc,da-x/ghc,TomMD/ghc,vTurbine/ghc,shlevy/ghc,mfine/ghc,olsner/ghc,ghc-android/ghc,olsner/ghc,vTurbine/ghc,acowley/ghc,ezyang/ghc,ezyang/ghc,wxwxwwxxx/ghc,sdiehl/ghc,anton-dessiatov/ghc,vikraman/ghc,AlexanderPankiv/ghc,snoyberg/ghc,siddhanathan/ghc,sgillespie/ghc,TomMD/ghc,mcschroeder/ghc,tjakway/ghcjvm,gridaphobe/ghc