Merge branch 'jn/makedepend'
* jn/makedepend:
Makefile: clarify definition of TEST_OBJS
Makefile: always remove .depend directories on 'make clean'
Makefile: tuck away generated makefile fragments in .depend
Teach Makefile to check header dependencies
Makefile: list standalone program object files in PROGRAM_OBJS
Makefile: lazily compute header dependencies
Makefile: list generated object files in OBJECTS
Makefile: disable default implicit rules
Makefile: rearrange dependency rules
Makefile: transport.o depends on branch.h now
Makefile: drop dependency on $(wildcard */*.h)
Makefile: clean up http-walker.o dependency rules
Makefile: remove wt-status.h from LIB_H
Makefile: make sure test helpers are rebuilt when headers change
Makefile: add missing header file dependencies
Conflicts:
Makefile