Add diagnosticMessages.generated.json to gitignore
Add diagnosticMessages.generated.json to gitignore

Before we accidentally commit it.
Eyas/TypeScript,blakeembrey/TypeScript,alexeagle/TypeScript,kimamula/TypeScript,nycdotnet/TypeScript,mmoskal/TypeScript,TukekeSoft/TypeScript,RyanCavanaugh/TypeScript,plantain-00/TypeScript,basarat/TypeScript,samuelhorwitz/typescript,Eyas/TypeScript,kimamula/TypeScript,jwbay/TypeScript,kitsonk/TypeScript,Microsoft/TypeScript,mihailik/TypeScript,ionux/TypeScript,mihailik/TypeScript,mihailik/TypeScript,RyanCavanaugh/TypeScript,basarat/TypeScript,minestarks/TypeScript,jwbay/TypeScript,plantain-00/TypeScript,weswigham/TypeScript,vilic/TypeScript,mmoskal/TypeScript,microsoft/TypeScript,Microsoft/TypeScript,synaptek/TypeScript,AbubakerB/TypeScript,mihailik/TypeScript,minestarks/TypeScript,thr0w/Thr0wScript,evgrud/TypeScript,nojvek/TypeScript,thr0w/Thr0wScript,mmoskal/TypeScript,chuckjaz/TypeScript,ionux/TypeScript,plantain-00/TypeScript,mmoskal/TypeScript,samuelhorwitz/typescript,weswigham/TypeScript,synaptek/TypeScript,AbubakerB/TypeScript,erikmcc/TypeScript,alexeagle/TypeScript,DLehenbauer/TypeScript,fabioparra/TypeScript,basarat/TypeScript,vilic/TypeScript,fabioparra/TypeScript,weswigham/TypeScript,fabioparra/TypeScript,evgrud/TypeScript,ziacik/TypeScript,Microsoft/TypeScript,evgrud/TypeScript,blakeembrey/TypeScript,samuelhorwitz/typescript,ziacik/TypeScript,nojvek/TypeScript,DLehenbauer/TypeScript,blakeembrey/TypeScript,basarat/TypeScript,AbubakerB/TypeScript,TukekeSoft/TypeScript,synaptek/TypeScript,kitsonk/TypeScript,kpreisser/TypeScript,vilic/TypeScript,nojvek/TypeScript,erikmcc/TypeScript,vilic/TypeScript,thr0w/Thr0wScript,fabioparra/TypeScript,nojvek/TypeScript,thr0w/Thr0wScript,Eyas/TypeScript,kimamula/TypeScript,jeremyepling/TypeScript,microsoft/TypeScript,ionux/TypeScript,AbubakerB/TypeScript,DLehenbauer/TypeScript,kpreisser/TypeScript,chuckjaz/TypeScript,jeremyepling/TypeScript,plantain-00/TypeScript,chuckjaz/TypeScript,blakeembrey/TypeScript,RyanCavanaugh/TypeScript,kitsonk/TypeScript,yortus/TypeScript,erikmcc/TypeScript,DLehenbauer/TypeScript,jwbay/TypeScript,nycdotnet/TypeScript,yortus/TypeScript,Eyas/TypeScript,donaldpipowitch/TypeScript,jwbay/TypeScript,synaptek/TypeScript,kimamula/TypeScript,minestarks/TypeScript,ionux/TypeScript,chuckjaz/TypeScript,nycdotnet/TypeScript,donaldpipowitch/TypeScript,donaldpipowitch/TypeScript,yortus/TypeScript,ziacik/TypeScript,samuelhorwitz/typescript,kpreisser/TypeScript,evgrud/TypeScript,SaschaNaz/TypeScript,SaschaNaz/TypeScript,donaldpipowitch/TypeScript,erikmcc/TypeScript,alexeagle/TypeScript,microsoft/TypeScript,TukekeSoft/TypeScript,SaschaNaz/TypeScript,SaschaNaz/TypeScript,ziacik/TypeScript,jeremyepling/TypeScript,yortus/TypeScript,nycdotnet/TypeScript