Fix bytecode generation issue related to ByteIO
Fix bytecode generation issue related to ByteIO

The placeholder bits were not being written to the ByteIO internal
buffer. Instead, a call to .write() is used to write the placeholder
after the object is initialized.

Signed-off-by: Kevin Conway <3473c1f185ca03eadc40ad288d84425b54fd7d57@gmail.com>

kevinconway/pycc,kevinconway/pycc