[Parse] Consolidate parsing IfConfig clauses
[Parse] Consolidate parsing IfConfig clauses

decl list position and stmt list poisiton.

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