package/cppcms: bump to 1.0.5

Bump cppcms since it seems to fixe an issue with gcc5+.
The new release has been build tested against a failing Buildroot config.

Fixes:
http://autobuild.buildroot.net/results/d9d/d9d3f40bf0a203e052d2a43ac7a6a1dfa60379b3/build-end.log



Signed-off-by: Romain Naour <romain.naour@openwide.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>