.travis.yml: fix typos in file
.travis.yml: fix typos in file

I diff-ed this with libiio, and it seems that this
is the culprit.

Error in Travis is
```
Installing deploy dependencies
Preparing deploy
No stash entries found.
missing api_key
failed to deploy
```

Diff-ing it also showed up a typo in a `compiler` specifier.

Signed-off-by: Alexandru Ardelean <c8ec8d7216643db8a88f8dd26a8db4e136d951e0@analog.com>

analogdevicesinc/libad9361-iio,analogdevicesinc/libad9361-iio,analogdevicesinc/libad9361-iio,analogdevicesinc/libad9361-iio