Modify log format

Always log file name and line number.
Instead of __PRETTY_FUNC_ use __func__ and log just the function name.
Logging full name with namespace, return value and parameters produces
unreadable gibberish.

This makes it easier to map log line to line that produced it.

Test: compile, look through the logs.
Change-Id: I3a72e8e498ded604fe61179191f1bc98b44c6a5c