cppmain.c (scan_translation_unit): Don't worry about putting a space after hashes.

cppmain.c (scan_translation_unit): Don't worry about putting a space after hashes.

	* cppmain.c (scan_translation_unit): Don't worry about
	putting a space after hashes.
	* cpplib.c (directive_diagnostics): New.
	(_cpp_handle_directive): Update to use directive_diagnostics.
	(run_directive): Don't toggle prevent_expansion.
	(do_line): Backup in case of the line extension.
	* cpplib.h (cpp_lexer_pos): Remove.
	* cppmacro.c (_cpp_create_definition): Precede a leading #
	with whitespace.

	* gcc.dg/cpp/line5.c: New testcase.

From-SVN: r45645