factor out MANIFEST, SRCS, DOCS, IMPORTS and COPY
Merge pull request #408 from dawgfoto/redoMakefileDeduplication

Redo makefile deduplication
feature config file for the core.sys.linux tree
deprecate clear
Merge pull request #415 from dawgfoto/DeprecateDestroy

deprecate clear
add core.sys.linux.dlfcn

- core.sys.posix.dlfcn
  - fix linux-MIPS constants
  - deprecate non-POSIX function
add core.sys.linux.link
Merge pull request #406 from dawgfoto/GNULinuxLinkHeader

GNU/linux <link.h> header