The kernel loading code is now isolated in the DynamicLoaderDarwinKernel;

remove the duplicates of this code in ProcessGDBRemote and ProcessKDP.
These two Process plugins will hardcode their DynamicLoader name to be
the DynamicLoaderDarwinKernel so the correct DynamicLoader is picked,
and return the kernel load address as the ImageInfosAddress.
<rdar://problem/12417038> 

llvm-svn: 165080