We had some problems:
simultaneous compiling of kconfig in the same tree;
attempt to use menuconfig in some examples and ut in batch mode (w/o interactive console)
Also increase debug abilities in CI:
force non-interactive building;
add variable DEBUG_SHELL to toggle verbosity of scripts
Too hard to stage the dependencies so that all clean steps complete before any build steps begin. Also, using and then
deleting and then regenerating SDKCONFIG_MAKEFILE in one pass is really hard to manage successfully.
Now the tests do not pass
Before we had incorrect code of the error code checking
in build_examples.sh for that case and did nothing in test_build_system.sh.