bitbake-metadata2doc.py: simplify versions format

For example, versions like "3.14+gitAUTOINC+xxxxx" are turned into
"3.14+git".

Signed-off-by: Mario Domenech Goulart <mario@ossystems.com.br>
bitbake-metadata2doc.sh: pass the BSP dir to bitbake-metadata2doc.py

Signed-off-by: Mario Domenech Goulart <mario@ossystems.com.br>
bitbake-metadata2doc.py: write the maintained/unmantained machines tables

Signed-off-by: Mario Domenech Goulart <mario@ossystems.com.br>
bitbake-metadata2doc.py: write the machines list

Signed-off-by: Mario Domenech Goulart <mario@ossystems.com.br>
bitbake-metadata2doc.sh: pass MACHINE to extract-bitbake-metadata.py

Signed-off-by: Mario Domenech Goulart <mario@ossystems.com.br>
bitbake-metadata2doc.py: generate the SoC family tree

Signed-off-by: Mario Domenech Goulart <mario@ossystems.com.br>
RN: soc-family.rst: include the SoC tree graph from a separate file (generated by scripts)

Signed-off-by: Mario Domenech Goulart <mario@ossystems.com.br>
bitbake-metadata2doc.py: typo fix in write_machines_list (s/close/close()/)

Signed-off-by: Mario Domenech Goulart <mario@ossystems.com.br>
bitbake-metadata2doc.py: don't show machine maintainers

Signed-off-by: Mario Domenech Goulart <mario@ossystems.com.br>
RN: add data files for the maintained/unmaintained machines

Signed-off-by: Mario Domenech Goulart <mario@ossystems.com.br>
RN: update data files generated by scripts to the most recent state

Signed-off-by: Mario Domenech Goulart <mario@ossystems.com.br>