Made Travis LDFLAGS/CFLAGS consistent with pywbem
Made Travis LDFLAGS/CFLAGS consistent with pywbem

Details:

* The pyzmq install issue on pywbem did not show up on pywbemtools
  because jupyter is not yet used here, so pyzmq is not installed.
  Nevertheless, this change makes the Travis control file consistent
  with pywbem:
  - Added /usr/lib to LDFLAGS
  - Added /usr/include to CFLAGS
  - Added additional echo statements for better diagnosis

Signed-off-by: Andreas Maier <0903150dae73adcf31eccfd2633bf70bbc40bd52@gmx.de>

pywbem/pywbemtools,pywbem/pywbemtools