Update notes for submitted changes

* Add pre-config script
Update notes for submitted changes

* Use sysroot -I= and -L= flags
Update notes for submitted changes

* Change  /usr/local/bin/python to /usr/bin/python2
Update notes for submitted changes

* Delete 2to3 script its installed by v3 too
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* Its late ...
Update notes for submitted changes

* Add missing fficonfig.py bits for aarch64
Update notes for submitted changes

* Add libx32 to lib dirs