See https://fedoraproject.org/wiki/Changes/F37Boost178
Drop patches:
deleted: boost-1.75.0-build-optflags.patch
deleted: boost-1.75.0-no-rpath.patch
deleted: boost-1.76.0-b2-build-flags.patch
deleted: boost-1.76.0-fix-include-inside-boost-namespace.patch
deleted: boost-1.76.0-fix-duplicate-typedef-in-mp.patch
Fix silent dropping of some libraries
See https://github.com/bfgroup/b2/pull/113
