[Ubuntu] Dependencies problem with ubuntugis-unstable on Trusty

[Even Rouault]

Hi,

One of the GDAL Travis-CI env uses Trusty with ubuntugis-unstable and since 
today I get the following errors (CI script unchanged) :

"""
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.

The following information may help to resolve the situation:

The following packages have unmet dependencies:
 libgeos-dev : Depends: libgeos-c1v5 (= 3.5.0-1~trusty1) but it is not going 
to be installed
 libspatialite-dev : Depends: libspatialite5 (= 4.1.1-5ubuntu2) but 
4.1.1-5ubuntu1 is to be installed
E: Unable to correct problems, you have held broken packages.
"""

Full log is at https://travis-ci.org/rouault/gdal_coverage/builds/145057288

Relevant part of the script :

sudo add-apt-repository -y ppa:ubuntugis/ubuntugis-unstable
sudo apt-get update
sudo apt-get install -y python-numpy libpq-dev libpng12-dev libjpeg-dev 
libgif-dev liblzma-dev libgeos-dev libcurl4-gnutls-dev libproj-dev libxml2-dev 
libexpat-dev libxerces-c-dev libnetcdf-dev netcdf-bin libpoppler-dev 
libspatialite-dev gpsbabel swig libhdf4-alt-dev libhdf5-serial-dev libpodofo-
dev poppler-utils libfreexl-dev unixodbc-dev libwebp-dev openjdk-7-jdk 
libepsilon-dev libgta-dev liblcms2-2 libpcre3-dev mercurial cmake libcrypto++-
dev

Any idea of what is going on ?

Thanks,

Even

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