Less 'make' chatter for lisp dir

Less 'make' chatter for lisp dir

* lisp/Makefile.in (THEFILE): Define to be 'no-such-file' by default,
to make it clearer that the caller must specify it.
(compile-onefile): Remove, replacing by ...
($(THEFILE)c): ... new rule.  This lets us use AM_V_GEN here.
($(THEFILE)c, .el.elc, $(MH_E_DIR)/mh-loaddefs.el)
($(TRAMP_DIR)/tramp-loaddefs.el, $(CAL_DIR)/cal-loaddefs.el)
($(CAL_DIR)/diary-loaddefs.el, $(CAL_DIR)/hol-loaddefs.el):
Use AM_V_GEN to lessen 'make' chatter.
(.el.elc): Omit duplicate comment.
* src/Makefile.in (%.elc): Adjust to compile-onefile change in
../lisp/Makefile.in.