Include example of multiple imports using from syntax

This highlights the difference between the pep8 guideline which also
states one module import per line, but allows for multiple modules to be
imported when using the 'from .. import ..' syntax, and the hacking
requirement that it should still be a single module import in either
form.

Add example of multiple imports using the syntax:

 from pkg import module1
 from pkg import module2

To distinguish that the similar pep8 guideline is not acceptable:

 from pkg import module1, module2

Change-Id: I2a0b70ae55a16f4a1fe86e051e408fb3bb8238cd
Merge "Include example of multiple imports using from syntax"