Fix test T5373 for +RTS/rtsopts changes
Fix test T5373 for +RTS/rtsopts changes

The test previously used +RTS -? as an example flag that is banned in
the -rtsopts=some mode. That flag is now allowed, so we pick -c instead.

TomMD/ghc,nushio3/ghc,anton-dessiatov/ghc,wxwxwwxxx/ghc,fmthoma/ghc,TomMD/ghc,ryantm/ghc,vTurbine/ghc,sgillespie/ghc,green-haskell/ghc,sgillespie/ghc,nushio3/ghc,hferreiro/replay,mcschroeder/ghc,frantisekfarka/ghc-dsi,elieux/ghc,ml9951/ghc,lukexi/ghc,sdiehl/ghc,shlevy/ghc,gcampax/ghc,oldmanmike/ghc,mfine/ghc,holzensp/ghc,bitemyapp/ghc,urbanslug/ghc,vikraman/ghc,TomMD/ghc,lukexi/ghc,ryantm/ghc,AlexanderPankiv/ghc,gridaphobe/ghc,wxwxwwxxx/ghc,frantisekfarka/ghc-dsi,hferreiro/replay,vTurbine/ghc,spacekitteh/smcghc,sgillespie/ghc,spacekitteh/smcghc,nushio3/ghc,ryantm/ghc,olsner/ghc,olsner/ghc,shlevy/ghc,tibbe/ghc,bitemyapp/ghc,gridaphobe/ghc,frantisekfarka/ghc-dsi,nkaretnikov/ghc,holzensp/ghc,wxwxwwxxx/ghc,siddhanathan/ghc,ghc-android/ghc,wxwxwwxxx/ghc,olsner/ghc,GaloisInc/halvm-ghc,anton-dessiatov/ghc,urbanslug/ghc,lukexi/ghc-7.8-arm64,gcampax/ghc,christiaanb/ghc,gcampax/ghc,oldmanmike/ghc,oldmanmike/ghc,urbanslug/ghc,gridaphobe/ghc,lukexi/ghc-7.8-arm64,sdiehl/ghc,forked-upstream-packages-for-ghcjs/ghc,vTurbine/ghc,AlexanderPankiv/ghc,nkaretnikov/ghc,sgillespie/ghc,lukexi/ghc,da-x/ghc,ghc-android/ghc,anton-dessiatov/ghc,christiaanb/ghc,hferreiro/replay,gcampax/ghc,anton-dessiatov/ghc,shlevy/ghc,ezyang/ghc,mfine/ghc,TomMD/ghc,sgillespie/ghc,acowley/ghc,ml9951/ghc,shlevy/ghc,nathyong/microghc-ghc,AlexanderPankiv/ghc,GaloisInc/halvm-ghc,ml9951/ghc,vikraman/ghc,spacekitteh/smcghc,forked-upstream-packages-for-ghcjs/ghc,snoyberg/ghc,GaloisInc/halvm-ghc,anton-dessiatov/ghc,ezyang/ghc,elieux/ghc,urbanslug/ghc,shlevy/ghc,gcampax/ghc,mcschroeder/ghc,AlexanderPankiv/ghc,lukexi/ghc,hferreiro/replay,wxwxwwxxx/ghc,elieux/ghc,tjakway/ghcjvm,sdiehl/ghc,nathyong/microghc-ghc,jstolarek/ghc,gridaphobe/ghc,spacekitteh/smcghc,christiaanb/ghc,vikraman/ghc,siddhanathan/ghc,forked-upstream-packages-for-ghcjs/ghc,AlexanderPankiv/ghc,fmthoma/ghc,fmthoma/ghc,olsner/ghc,siddhanathan/ghc,urbanslug/ghc,vikraman/ghc,green-haskell/ghc,lukexi/ghc-7.8-arm64,nathyong/microghc-ghc,holzensp/ghc,elieux/ghc,TomMD/ghc,ezyang/ghc,snoyberg/ghc,lukexi/ghc-7.8-arm64,fmthoma/ghc,lukexi/ghc-7.8-arm64,ghc-android/ghc,mcschroeder/ghc,ml9951/ghc,gridaphobe/ghc,da-x/ghc,lukexi/ghc,mettekou/ghc,shlevy/ghc,nkaretnikov/ghc,siddhanathan/ghc,mfine/ghc,jstolarek/ghc,forked-upstream-packages-for-ghcjs/ghc,tjakway/ghcjvm,acowley/ghc,TomMD/ghc,forked-upstream-packages-for-ghcjs/ghc,vikraman/ghc,jstolarek/ghc,sdiehl/ghc,tjakway/ghcjvm,gcampax/ghc,fmthoma/ghc,green-haskell/ghc,snoyberg/ghc,mettekou/ghc,GaloisInc/halvm-ghc,elieux/ghc,gridaphobe/ghc,nushio3/ghc,elieux/ghc,acowley/ghc,vikraman/ghc,sdiehl/ghc,oldmanmike/ghc,da-x/ghc,olsner/ghc,tibbe/ghc,snoyberg/ghc,ml9951/ghc,mfine/ghc,sdiehl/ghc,christiaanb/ghc,da-x/ghc,christiaanb/ghc,ml9951/ghc,snoyberg/ghc,bitemyapp/ghc,olsner/ghc,olsner/ghc,nushio3/ghc,tibbe/ghc,snoyberg/ghc,nushio3/ghc,tjakway/ghcjvm,fmthoma/ghc,ezyang/ghc,mcschroeder/ghc,forked-upstream-packages-for-ghcjs/ghc,tibbe/ghc,ghc-android/ghc,anton-dessiatov/ghc,mettekou/ghc,urbanslug/ghc,siddhanathan/ghc,nkaretnikov/ghc,mcschroeder/ghc,da-x/ghc,vTurbine/ghc,hferreiro/replay,nathyong/microghc-ghc,ml9951/ghc,GaloisInc/halvm-ghc,GaloisInc/halvm-ghc,vikraman/ghc,AlexanderPankiv/ghc,anton-dessiatov/ghc,sgillespie/ghc,tjakway/ghcjvm,vTurbine/ghc,holzensp/ghc,spacekitteh/smcghc,tibbe/ghc,fmthoma/ghc,snoyberg/ghc,mettekou/ghc,gcampax/ghc,green-haskell/ghc,vTurbine/ghc,vTurbine/ghc,acowley/ghc,acowley/ghc,oldmanmike/ghc,mfine/ghc,tjakway/ghcjvm,ml9951/ghc,bitemyapp/ghc,GaloisInc/halvm-ghc,frantisekfarka/ghc-dsi,nathyong/microghc-ghc,jstolarek/ghc,urbanslug/ghc,nathyong/microghc-ghc,wxwxwwxxx/ghc,mettekou/ghc,sdiehl/ghc,shlevy/ghc,christiaanb/ghc,forked-upstream-packages-for-ghcjs/ghc,nathyong/microghc-ghc,bitemyapp/ghc,ezyang/ghc,frantisekfarka/ghc-dsi,ghc-android/ghc,ryantm/ghc,nkaretnikov/ghc,da-x/ghc,sgillespie/ghc,ezyang/ghc,acowley/ghc,mfine/ghc,gridaphobe/ghc,siddhanathan/ghc,christiaanb/ghc,tjakway/ghcjvm,da-x/ghc,ryantm/ghc,wxwxwwxxx/ghc,ezyang/ghc,green-haskell/ghc,mcschroeder/ghc,acowley/ghc,mettekou/ghc,elieux/ghc,mfine/ghc,AlexanderPankiv/ghc,mcschroeder/ghc,nkaretnikov/ghc,hferreiro/replay,ghc-android/ghc,nushio3/ghc,oldmanmike/ghc,nkaretnikov/ghc,oldmanmike/ghc,mettekou/ghc,siddhanathan/ghc,jstolarek/ghc,ghc-android/ghc,TomMD/ghc,holzensp/ghc,hferreiro/replay