Add struct definition for 'objc_method_description'.
Add struct definition for 'objc_method_description'.

TooTallNate/NodObjC,mralexgray/NodObjC,TooTallNate/NodObjC,telerik/NodObjC,jerson/NodObjC,jerson/NodObjC,jerson/NodObjC,telerik/NodObjC,mralexgray/NodObjC