Extend testing of build scripts

[canihavesomecoffee]

Currently, the bot uses the build command (see https://github.com/canihavesomecoffee/ccx_gitbot/blob/8ce6c825ca1f7edd95273ac7b786b67af5e45b37/virtual_machine/runTests#L81 and https://github.com/canihavesomecoffee/ccx_gitbot/blob/8ce6c825ca1f7edd95273ac7b786b67af5e45b37/worker/private/runLocal#L110).

Due to some recent errors with the CMake script (see CCExtractor/ccextractor#290), Carlos suggested to add more tests for the build scripts.

So the shell scripts should be modified to add testing of successful builds for the build, builddebug and CMake scripts on Linux.

It should preferably be investigated too if it's possible to test the Windows & mac build scripts.

Maybe use Jenkins for this?