package/odb: fix build with gcc 11

Add -std=c++11 to fix the following build failure with gcc 11:

/data/buildroot-autobuilder/instance-0/output-1/host/include/cutl/shared-ptr/base.hxx:34:41: error: ISO C++17 does not allow dynamic exception specifications
   34 | operator new (std::size_t, cutl::share) throw (std::bad_alloc);
      |                                         ^~~~~

Fixes:
 - http://autobuild.buildroot.org/results/9cbb8be7a1d8ac5913fbc5e2a78c4c45b5daf8e2



Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>