'fetch the patches to the local src_dir'

def get_patches(self, patches):

    local_patches = []
    for patch in patches:
        dest = os.path.join(self.src_dir, os.path.basename(patch))
        print ('get_file    %s    %s    %s    %s' % (patch, dest, self.src_dir, os.path.basename(patch)))
        utils.get_file(patch, dest)
        md5sum = utils.system_output(('md5sum    ' + dest)).split()[0]
        local_patches.append((patch, dest, md5sum))
    return local_patches
