Suppress extra '#1 <built-in> or '#1 <command line>' on -dD output.

	* c-opts.c (finish_options): Use internal line 0 for <command-line>.
	* c-ppoutput.c (cb_define): Don't increment line 0.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@114311 138bc75d-0d04-0410-961f-82ee72b054a4