[HSA-682 Test] Add getopt support in the test suite for GDB
[HSA-682 Test] Add getopt as yet another parser for command line options in the test suite for GDB
Fix: failfast not supported by Python older than 2.7
[HSA-682 Test] Fix the compatibility issue of hsail_gdb_test.py with CentOS 6.x and Python 2.6.x.