Updated Xcode project to reference public headers in dispatch directory.
Updated Xcode project to reference public headers in dispatch directory.


git-svn-id: fd4a176c55b201366617f1b4a14a5ec6630ef30e@37 5710d607-3af0-45f8-8f96-4508d4f60227

nickhutchinson/libdispatch,rpaulo/libdispatch-freebsd,PSPDFKit-labs/libdispatch,mir-ror/libdispatch,JackieXie168/libdispatch,PSPDFKit-labs/libdispatch,evaautomation/libdispatch,jcbertin/libdispatch,nickhutchinson/libdispatch,PSPDFKit-labs/libdispatch,JackieXie168/libdispatch,Chilledheart/libdispatch,JackieXie168/libdispatch,JackieXie168/libdispatch,SproutOrc/libdispatch,JackieXie168/libdispatch,nickhutchinson/libdispatch,jcbertin/libdispatch,rpaulo/libdispatch-freebsd,mir-ror/libdispatch,rpaulo/libdispatch-freebsd,SproutOrc/libdispatch,jcbertin/libdispatch,mir-ror/libdispatch,SproutOrc/libdispatch,Chilledheart/libdispatch,Chilledheart/libdispatch,nickhutchinson/libdispatch,evaautomation/libdispatch,evaautomation/libdispatch,evaautomation/libdispatch,SproutOrc/libdispatch,PSPDFKit-labs/libdispatch