Sema: Fix CSRanking in preparation for generic subscripts
Sema: Fix CSRanking in preparation for generic subscripts

Subscripts in generic context will soon have a
GenericFunctionType, so get ready to handle that.

Jnosh/swift,tkremenek/swift,hooman/swift,aschwaighofer/swift,milseman/swift,djwbrown/swift,natecook1000/swift,return/swift,danielmartin/swift,zisko/swift,alblue/swift,gregomni/swift,parkera/swift,frootloops/swift,rudkx/swift,jtbandes/swift,tjw/swift,gribozavr/swift,practicalswift/swift,atrick/swift,austinzheng/swift,frootloops/swift,glessard/swift,stephentyrone/swift,brentdax/swift,Jnosh/swift,practicalswift/swift,karwa/swift,atrick/swift,jckarter/swift,huonw/swift,amraboelela/swift,stephentyrone/swift,return/swift,danielmartin/swift,rudkx/swift,jopamer/swift,tjw/swift,allevato/swift,swiftix/swift,hughbe/swift,felix91gr/swift,shajrawi/swift,aschwaighofer/swift,ahoppen/swift,harlanhaskins/swift,lorentey/swift,arvedviehweger/swift,uasys/swift,tkremenek/swift,amraboelela/swift,shahmishal/swift,hughbe/swift,aschwaighofer/swift,danielmartin/swift,apple/swift,atrick/swift,huonw/swift,gregomni/swift,danielmartin/swift,tinysun212/swift-windows,roambotics/swift,parkera/swift,jtbandes/swift,parkera/swift,airspeedswift/swift,CodaFi/swift,deyton/swift,return/swift,hughbe/swift,frootloops/swift,lorentey/swift,hooman/swift,stephentyrone/swift,xedin/swift,milseman/swift,milseman/swift,airspeedswift/swift,alblue/swift,aschwaighofer/swift,gribozavr/swift,Jnosh/swift,JGiola/swift,uasys/swift,sschiau/swift,karwa/swift,hooman/swift,harlanhaskins/swift,tjw/swift,atrick/swift,shahmishal/swift,harlanhaskins/swift,jopamer/swift,sschiau/swift,rudkx/swift,shajrawi/swift,lorentey/swift,tjw/swift,codestergit/swift,amraboelela/swift,zisko/swift,practicalswift/swift,danielmartin/swift,xedin/swift,gribozavr/swift,deyton/swift,gregomni/swift,nathawes/swift,nathawes/swift,swiftix/swift,devincoughlin/swift,Jnosh/swift,frootloops/swift,djwbrown/swift,xedin/swift,shajrawi/swift,xedin/swift,jckarter/swift,karwa/swift,CodaFi/swift,tkremenek/swift,nathawes/swift,gregomni/swift,felix91gr/swift,codestergit/swift,parkera/swift,gregomni/swift,allevato/swift,benlangmuir/swift,gregomni/swift,calebd/swift,tjw/swift,glessard/swift,stephentyrone/swift,OscarSwanros/swift,tjw/swift,OscarSwanros/swift,jopamer/swift,benlangmuir/swift,arvedviehweger/swift,roambotics/swift,CodaFi/swift,glessard/swift,hooman/swift,felix91gr/swift,milseman/swift,roambotics/swift,OscarSwanros/swift,djwbrown/swift,zisko/swift,bitjammer/swift,arvedviehweger/swift,xedin/swift,roambotics/swift,codestergit/swift,alblue/swift,calebd/swift,djwbrown/swift,shahmishal/swift,gribozavr/swift,rudkx/swift,arvedviehweger/swift,hooman/swift,stephentyrone/swift,natecook1000/swift,jckarter/swift,natecook1000/swift,tinysun212/swift-windows,brentdax/swift,swiftix/swift,brentdax/swift,parkera/swift,shahmishal/swift,austinzheng/swift,JGiola/swift,karwa/swift,practicalswift/swift,hughbe/swift,practicalswift/swift,alblue/swift,arvedviehweger/swift,apple/swift,lorentey/swift,natecook1000/swift,tkremenek/swift,xwu/swift,tinysun212/swift-windows,karwa/swift,devincoughlin/swift,xedin/swift,swiftix/swift,practicalswift/swift,arvedviehweger/swift,jopamer/swift,jckarter/swift,tjw/swift,JGiola/swift,calebd/swift,jmgc/swift,roambotics/swift,deyton/swift,shahmishal/swift,manavgabhawala/swift,OscarSwanros/swift,shahmishal/swift,gribozavr/swift,bitjammer/swift,austinzheng/swift,uasys/swift,nathawes/swift,Jnosh/swift,felix91gr/swift,codestergit/swift,devincoughlin/swift,djwbrown/swift,arvedviehweger/swift,jmgc/swift,djwbrown/swift,sschiau/swift,ahoppen/swift,jtbandes/swift,jmgc/swift,karwa/swift,felix91gr/swift,calebd/swift,lorentey/swift,codestergit/swift,CodaFi/swift,parkera/swift,ahoppen/swift,tinysun212/swift-windows,Jnosh/swift,swiftix/swift,tkremenek/swift,milseman/swift,uasys/swift,parkera/swift,zisko/swift,apple/swift,Jnosh/swift,CodaFi/swift,jmgc/swift,hughbe/swift,alblue/swift,glessard/swift,djwbrown/swift,glessard/swift,swiftix/swift,sschiau/swift,practicalswift/swift,allevato/swift,CodaFi/swift,milseman/swift,benlangmuir/swift,uasys/swift,danielmartin/swift,shajrawi/swift,OscarSwanros/swift,sschiau/swift,atrick/swift,devincoughlin/swift,allevato/swift,brentdax/swift,frootloops/swift,jtbandes/swift,sschiau/swift,frootloops/swift,felix91gr/swift,xwu/swift,karwa/swift,codestergit/swift,aschwaighofer/swift,xwu/swift,devincoughlin/swift,austinzheng/swift,jtbandes/swift,nathawes/swift,calebd/swift,danielmartin/swift,sschiau/swift,bitjammer/swift,huonw/swift,airspeedswift/swift,OscarSwanros/swift,aschwaighofer/swift,apple/swift,JGiola/swift,OscarSwanros/swift,uasys/swift,bitjammer/swift,amraboelela/swift,harlanhaskins/swift,CodaFi/swift,bitjammer/swift,hooman/swift,manavgabhawala/swift,roambotics/swift,hughbe/swift,natecook1000/swift,practicalswift/swift,deyton/swift,jmgc/swift,lorentey/swift,xwu/swift,xedin/swift,huonw/swift,harlanhaskins/swift,natecook1000/swift,return/swift,harlanhaskins/swift,swiftix/swift,austinzheng/swift,calebd/swift,karwa/swift,tkremenek/swift,xwu/swift,rudkx/swift,hooman/swift,ahoppen/swift,rudkx/swift,brentdax/swift,ahoppen/swift,zisko/swift,milseman/swift,xwu/swift,jopamer/swift,xedin/swift,atrick/swift,amraboelela/swift,shajrawi/swift,jckarter/swift,jtbandes/swift,ahoppen/swift,aschwaighofer/swift,shahmishal/swift,natecook1000/swift,austinzheng/swift,xwu/swift,alblue/swift,shajrawi/swift,return/swift,gribozavr/swift,calebd/swift,amraboelela/swift,manavgabhawala/swift,brentdax/swift,JGiola/swift,allevato/swift,huonw/swift,jmgc/swift,jopamer/swift,harlanhaskins/swift,airspeedswift/swift,jckarter/swift,bitjammer/swift,shahmishal/swift,bitjammer/swift,amraboelela/swift,austinzheng/swift,felix91gr/swift,devincoughlin/swift,jtbandes/swift,return/swift,tkremenek/swift,nathawes/swift,huonw/swift,parkera/swift,tinysun212/swift-windows,manavgabhawala/swift,frootloops/swift,uasys/swift,zisko/swift,allevato/swift,return/swift,glessard/swift,deyton/swift,gribozavr/swift,airspeedswift/swift,deyton/swift,nathawes/swift,shajrawi/swift,tinysun212/swift-windows,airspeedswift/swift,huonw/swift,airspeedswift/swift,sschiau/swift,allevato/swift,devincoughlin/swift,lorentey/swift,alblue/swift,benlangmuir/swift,jmgc/swift,apple/swift,deyton/swift,benlangmuir/swift,jopamer/swift,lorentey/swift,hughbe/swift,devincoughlin/swift,codestergit/swift,tinysun212/swift-windows,stephentyrone/swift,apple/swift,manavgabhawala/swift,gribozavr/swift,brentdax/swift,stephentyrone/swift,jckarter/swift,manavgabhawala/swift,zisko/swift,JGiola/swift,benlangmuir/swift,manavgabhawala/swift,shajrawi/swift