[Travis] Use gcov long options
[Travis] Use gcov long options

Long option are more readable.

miguelgaio/parameter-framework,01org/parameter-framework,clero/parameter-framework,android-ia/hardware_intel_parameter-framework,krocard/parameter-framework,miguelgaio/parameter-framework,sdnnfv/parameter-framework,wzairix/parameter-framework,miguelgaio/parameter-framework,dawagner/parameter-framework,mgaio/parameter-framework,anwarMov/parameter-framework,mgaio/parameter-framework,zchokri/parameter-framework,Makohoek/parameter-framework,sdnnfv/parameter-framework,sdnnfv/parameter-framework,krocard/parameter-framework,dawagner/parameter-framework,dbrageul/parameter-framework,anwarMov/parameter-framework,wzairix/parameter-framework,android-ia/hardware_intel_parameter-framework,Makohoek/parameter-framework,dawagner/parameter-framework,anwarMov/parameter-framework,01org/parameter-framework,clero/parameter-framework,dbrageul/parameter-framework,soaresm/parameter-framework,zchokri/parameter-framework,wzairix/parameter-framework,clero/parameter-framework,soaresm/parameter-framework,krocard/parameter-framework,dbrageul/parameter-framework,Makohoek/parameter-framework,mgaio/parameter-framework,01org/parameter-framework,zchokri/parameter-framework,android-ia/hardware_intel_parameter-framework,soaresm/parameter-framework