buildincludes: don't know how to make libelf.h etc.

[Franco Fichtner]

Hi everyone,

I'm trying to build 11-CURRENT, but seeing missing header files
in lib/libelf, lib/libdwarf and lib/nucurses during a seemingly
simple `make buildworld' run.

The include files land e.g. in a tmp/legacy/usr/include object
path and copying them manually fixes that particular issue until
the next error is triggered.

I'm currently using 10.1 to build 11-CURRENT.  Has anyone else
seen this or has any idea how to solve this?


Cheers,
Franco