Update .travis.yml to refer to Qt 5.6.2
Update .travis.yml to refer to Qt 5.6.2

Signed-off-by: Thiago Macieira <0ed1648d92ca0373297a182b1dba1b974ad10d88@intel.com>

intel/tinycbor,thiagomacieira/tinycbor,thiagomacieira/tinycbor,intel/tinycbor,01org/tinycbor,thiagomacieira/tinycbor,thiagomacieira/tinycbor,01org/tinycbor,intel/tinycbor,01org/tinycbor,intel/tinycbor