cross-gdb build broken

[binary1230]

[INFO ]  Installing cross-gdb
[ERROR]    /opt/esp-open-sdk/esp-open-sdk/crosstool-NG/.build/src/gdb-7.10/gdb/python/python.c:1757:3: error: too few arguments to function '_PyImport_FixupBuiltin'
[ERROR]    make[5]: *** [Makefile:2517: python.o] Error 1
[ERROR]    make[4]: *** [Makefile:8755: all-gdb] Error 2
[ERROR]    make[3]: *** [Makefile:845: all] Error 2
[ERROR]
[ERROR]  >>
[ERROR]  >>  Build failed in step 'Installing cross-gdb'
[ERROR]  >>        called in step '(top-level)'
[ERROR]  >>
[ERROR]  >>  Error happened in: CT_DoExecLog[scripts/functions@257]
[ERROR]  >>        called from: do_debug_gdb_build[scripts/build/debug/300-gdb.sh@120]
[ERROR]  >>        called from: do_debug[scripts/build/debug.sh@35]
[ERROR]  >>        called from: main[scripts/crosstool-NG.sh@646]
[ERROR]  >>
[ERROR]  >>  For more info on this error, look at the file: 'build.log'
[ERROR]  >>  There is a list of known issues, some with workarounds, in:
[ERROR]  >>      'share/doc/crosstool-ng/crosstool-ng-1.22.0-71-g7a6451e0/B - Known issues.txt'

it's probably this.
pfalcon#339

as a workaround I just turned off gdb building since we don't need it for our fork, but, probably better to fix this the right way. when we figure it out, undo this commit:
Unit-e/crosstool-NG@0f3d04b

[ChrisMacGregor]

This may be the fix you want:

https://github.com/ChrisMacGregor/esp-open-sdk/blob/builds-on-Ubuntu-21.10/1000-fix-build-python3.9.patch

I also ran into some other issues that needed patches. In case it is useful, the end result (which gets me a clean build on Ubuntu 21.10 of an apparently working toolchain) can be found here:

pfalcon#391
https://github.com/ChrisMacGregor/esp-open-sdk/tree/builds-on-Ubuntu-21.10
Tarball of built toolchain: https://github.com/ChrisMacGregor/esp-open-sdk/releases/tag/builds-on-Ubuntu-21.10

[binary1230]

Hey nice! Might give this a shot soon. Cc @cnlohr in case he's interested too