Changed the declaration default access specifier to be public.
Changed the declaration default access specifier to be public.

This fixes some problems with CheckIgnoredDeclsPass that ignores declarations that are not public, which .
imazen/CppSharp,xistoso/CppSharp,genuinelucifer/CppSharp,u255436/CppSharp,Samana/CppSharp,nalkaro/CppSharp,mydogisbox/CppSharp,inordertotest/CppSharp,xistoso/CppSharp,imazen/CppSharp,mohtamohit/CppSharp,ktopouzi/CppSharp,nalkaro/CppSharp,ddobrev/CppSharp,u255436/CppSharp,zillemarco/CppSharp,mono/CppSharp,mohtamohit/CppSharp,KonajuGames/CppSharp,txdv/CppSharp,txdv/CppSharp,imazen/CppSharp,mydogisbox/CppSharp,ddobrev/CppSharp,genuinelucifer/CppSharp,zillemarco/CppSharp,u255436/CppSharp,SonyaSa/CppSharp,mono/CppSharp,xistoso/CppSharp,zillemarco/CppSharp,inordertotest/CppSharp,genuinelucifer/CppSharp,SonyaSa/CppSharp,KonajuGames/CppSharp,mohtamohit/CppSharp,nalkaro/CppSharp,mydogisbox/CppSharp,inordertotest/CppSharp,mono/CppSharp,imazen/CppSharp,xistoso/CppSharp,SonyaSa/CppSharp,txdv/CppSharp,zillemarco/CppSharp,mydogisbox/CppSharp,ddobrev/CppSharp,mono/CppSharp,Samana/CppSharp,genuinelucifer/CppSharp,imazen/CppSharp,mohtamohit/CppSharp,ktopouzi/CppSharp,txdv/CppSharp,KonajuGames/CppSharp,nalkaro/CppSharp,Samana/CppSharp,zillemarco/CppSharp,ktopouzi/CppSharp,mydogisbox/CppSharp,KonajuGames/CppSharp,u255436/CppSharp,Samana/CppSharp,SonyaSa/CppSharp,ktopouzi/CppSharp,KonajuGames/CppSharp,ddobrev/CppSharp,txdv/CppSharp,ktopouzi/CppSharp,xistoso/CppSharp,genuinelucifer/CppSharp,Samana/CppSharp,SonyaSa/CppSharp,mono/CppSharp,nalkaro/CppSharp,inordertotest/CppSharp,u255436/CppSharp,mono/CppSharp,ddobrev/CppSharp,inordertotest/CppSharp,mohtamohit/CppSharp