cpp.texi: Update for -MT.
* cpp.texi: Update for -MT.
* cppinit.c (initialize_dependency_output): Add a default
target if none has been given already.
(no_tgt, OPT_MT): New.
(cpp_handle_option): Handle -MT. Update -M etc.
* cpplib.h (struct cpp_options): Remove deps_target.
* gcc.c (cpp_options): Handle -MT.
* mkdeps.c (struct deps): Move from mkdeps.h.
(deps_calc_target): Rename deps_add_default_target. Add a
default target if none has been specified already.
* mkdeps.h (struct deps): Move to mkdeps.c.
(deps_calc_target): Rename deps_add_default_target.
From-SVN: r38681