Add a simple test_executable that links to all discovered components.
This is intended to verify if the component sources can be compiled
using the command `cmake --build build/ --target test_executable`. The
ldgen is not yet integrated, so the test_executable is not actually
created or linked. However, this process can be used to check if the
components are compiled.
Signed-off-by: Frantisek Hrbata <frantisek.hrbata@espressif.com>
Frantisek Hrbata
35d5eaac79