Flush stdout in test case for #10596
Flush stdout in test case for #10596

which might help, as it has helped with lots of other TH-related test
cases in the past.

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