Add log4cplus headers to the list of products
Add log4cplus headers to the list of products

On systems that build log4cplus, SCons has to be made aware
of the headers created by the build, so C++ Scanner can properly
create dependencies for source files.

Change-Id: I9ba5c89b967e50523e409ce210f9acf6d8dc1688
Partial-Bug: #1476261

eonpatapon/contrail-controller,nischalsheth/contrail-controller,eonpatapon/contrail-controller,nischalsheth/contrail-controller,nischalsheth/contrail-controller,eonpatapon/contrail-controller,nischalsheth/contrail-controller,rombie/contrail-controller,rombie/contrail-controller,nischalsheth/contrail-controller,eonpatapon/contrail-controller,nischalsheth/contrail-controller,rombie/contrail-controller,nischalsheth/contrail-controller,rombie/contrail-controller,nischalsheth/contrail-controller,rombie/contrail-controller,rombie/contrail-controller,eonpatapon/contrail-controller,rombie/contrail-controller,eonpatapon/contrail-controller,eonpatapon/contrail-controller