libxcb: add debuginfo package, import a few changes from #2736
libxcb: add debuginfo package, import a few changes from #2736

moochris/haikuports,haikuports/haikuports,Begasus/haikuports,moochris/haikuports,Begasus/haikuports,haikuports/haikuports,haikuports/haikuports,nielx/haikuports,nielx/haikuports,moochris/haikuports,Begasus/haikuports,Begasus/haikuports,haikuports/haikuports,Begasus/haikuports,haikuports/haikuports,nielx/haikuports