Hotfix for UART5
Revert "Hotfix for UART5"

This reverts commit b08ca02410cc02f75bbfe154963edcea6767972e.
Some early gdb/Python macros for working with NuttX.

Note; only tested with gdb 7.6. Will definitely not work with the stock PX4 toolchain's gdb.
Merge remote-tracking branch 'upstream/master'
Update px4io update default file list

Add px4io-v1_default.bin as a potential candidate firmware load for
PX4IO board.