cmake: On configure error suggest looking at CMake*.log files

When CMake reports failure to configure a project, especially when the
toolchain does not initialize properly, the true reason may be clear
from reading the CMakeFiles/CMake(Output|Error).log files.  Advise users
to look at these files if they exist when configuration fails.

Add RunCMake.Configure test to check that the log files are mentioned
when configuration fails.
Merge topic 'cmake-error-advice' into next

18e1bfb cmake: On configure error suggest looking at CMake*.log files