DPL enhancement - line printing in case of error
[Issue#] SSDWSSP-710
[Feature] Provides backtrace (i.e. source code file name + line number)
in case of error.
[Cause] Info amount in case of test failure was not sufficient
to determine execution path. There was a need of passing
__LINE__ or similar preprocessor macros as arguments.
[Solution] Backtrace printing based on the gdb output (gdb is triggered
after particular test fails).
[Verification] Compile & install on the target. Run without gdb installed too.
Run example tests which fails and examine the output.
Change-Id: I749b8efa9ce457df41baebbaefd6aec869f772a7