avio: avio: avio_ prefixes for put_* functions
In the name of consistency:
put_byte -> avio_w8
put_<type> -> avio_w<type>
put_buffer -> avio_write
put_nbyte will be made private
put_tag will be merged with avio_put_str
Signed-off-by:
Ronald S. Bultje <rsbultje@gmail.com>