build: always process `include`
build: always process `include`

The `include` subdirectory now generates a header which is used for the
runtime as well, making this directory a need irrespective of whether
the tools are being built or not.  This repairs the build of just the
runtime without the tools.

glessard/swift,danielmartin/swift,airspeedswift/swift,allevato/swift,hooman/swift,xwu/swift,CodaFi/swift,benlangmuir/swift,practicalswift/swift,CodaFi/swift,devincoughlin/swift,glessard/swift,roambotics/swift,hooman/swift,gregomni/swift,rudkx/swift,apple/swift,ahoppen/swift,rudkx/swift,sschiau/swift,danielmartin/swift,parkera/swift,xedin/swift,gregomni/swift,jmgc/swift,danielmartin/swift,parkera/swift,shahmishal/swift,tkremenek/swift,allevato/swift,xwu/swift,sschiau/swift,shajrawi/swift,devincoughlin/swift,glessard/swift,harlanhaskins/swift,jmgc/swift,nathawes/swift,austinzheng/swift,atrick/swift,gregomni/swift,karwa/swift,xedin/swift,devincoughlin/swift,devincoughlin/swift,jckarter/swift,airspeedswift/swift,amraboelela/swift,airspeedswift/swift,xedin/swift,danielmartin/swift,tkremenek/swift,harlanhaskins/swift,devincoughlin/swift,aschwaighofer/swift,gribozavr/swift,roambotics/swift,gribozavr/swift,hooman/swift,practicalswift/swift,shajrawi/swift,ahoppen/swift,practicalswift/swift,lorentey/swift,gribozavr/swift,atrick/swift,CodaFi/swift,austinzheng/swift,karwa/swift,atrick/swift,amraboelela/swift,hooman/swift,sschiau/swift,allevato/swift,stephentyrone/swift,roambotics/swift,roambotics/swift,stephentyrone/swift,lorentey/swift,xwu/swift,apple/swift,austinzheng/swift,JGiola/swift,nathawes/swift,allevato/swift,karwa/swift,apple/swift,jmgc/swift,aschwaighofer/swift,parkera/swift,allevato/swift,rudkx/swift,austinzheng/swift,apple/swift,rudkx/swift,gribozavr/swift,karwa/swift,allevato/swift,harlanhaskins/swift,parkera/swift,CodaFi/swift,jmgc/swift,parkera/swift,practicalswift/swift,nathawes/swift,xwu/swift,xedin/swift,harlanhaskins/swift,harlanhaskins/swift,karwa/swift,aschwaighofer/swift,gregomni/swift,jckarter/swift,rudkx/swift,shahmishal/swift,parkera/swift,xwu/swift,airspeedswift/swift,jckarter/swift,lorentey/swift,hooman/swift,jckarter/swift,JGiola/swift,gribozavr/swift,sschiau/swift,JGiola/swift,benlangmuir/swift,devincoughlin/swift,shajrawi/swift,shahmishal/swift,gribozavr/swift,austinzheng/swift,ahoppen/swift,tkremenek/swift,jckarter/swift,lorentey/swift,atrick/swift,xedin/swift,xwu/swift,aschwaighofer/swift,shajrawi/swift,glessard/swift,xwu/swift,sschiau/swift,danielmartin/swift,ahoppen/swift,stephentyrone/swift,airspeedswift/swift,parkera/swift,jmgc/swift,nathawes/swift,austinzheng/swift,gregomni/swift,sschiau/swift,shajrawi/swift,tkremenek/swift,amraboelela/swift,xedin/swift,amraboelela/swift,hooman/swift,shahmishal/swift,stephentyrone/swift,CodaFi/swift,nathawes/swift,benlangmuir/swift,airspeedswift/swift,amraboelela/swift,nathawes/swift,karwa/swift,sschiau/swift,devincoughlin/swift,aschwaighofer/swift,gregomni/swift,atrick/swift,lorentey/swift,aschwaighofer/swift,roambotics/swift,ahoppen/swift,lorentey/swift,ahoppen/swift,shahmishal/swift,rudkx/swift,karwa/swift,harlanhaskins/swift,allevato/swift,JGiola/swift,practicalswift/swift,karwa/swift,JGiola/swift,xedin/swift,hooman/swift,jmgc/swift,lorentey/swift,harlanhaskins/swift,practicalswift/swift,shajrawi/swift,atrick/swift,danielmartin/swift,CodaFi/swift,nathawes/swift,austinzheng/swift,devincoughlin/swift,shahmishal/swift,tkremenek/swift,tkremenek/swift,tkremenek/swift,apple/swift,roambotics/swift,stephentyrone/swift,glessard/swift,jckarter/swift,stephentyrone/swift,practicalswift/swift,amraboelela/swift,apple/swift,gribozavr/swift,shahmishal/swift,stephentyrone/swift,shajrawi/swift,CodaFi/swift,jmgc/swift,practicalswift/swift,danielmartin/swift,aschwaighofer/swift,shahmishal/swift,benlangmuir/swift,sschiau/swift,parkera/swift,shajrawi/swift,benlangmuir/swift,gribozavr/swift,benlangmuir/swift,airspeedswift/swift,jckarter/swift,amraboelela/swift,JGiola/swift,lorentey/swift,xedin/swift,glessard/swift