Fix GCC 4.8 Drone job to actually use 4.8

Update .drone.jsonnet

Update .drone.jsonnet

Added a release notes entry for the empty_value fix.

Disable the tn_holder<wchar_t> specialization when BOOST_NO_INTRINSIC…

…_WCHAR_T. Refs boostorg#173.

Merge pull request boostorg#169 from k3DW/feature/168

Fix deprecated warning ignores in allocator_access.hpp

Updated comments.

Use libstdc++11 for clang prior to 16.

Clang prior to version 16 does not support libstdc++13 that is installed
by default in GHA image ubuntu 22.04 in C++20 mode.

Update test/Jamfile

Android doesn't support pthread_setcancelstate. Fixes boostorg#150.