Unify error and message functions:

Unify error and message functions:

* toplev.c: Include "gvarargs.h".
(fatal_insn_not_found): Omit superfluous argument to error.
(vmessage, v_message_with_file_and_line): New functions.
(v_message_with_decl, file_and_line_for_asm): Likewise.
(v_error_with_file_and_line, v_error_with_decl): Likewise.
(v_error_for_asm, verror, vfatal): Likewise.
(v_warning_with_file_and_line, v_warning_with_decl): Likewise.
(v_warning_for_asm, vwarning): Likewise.
(error_with_file_and_line, error_with_decl, error, fatal): Now just wrappers
for above functions.
(error_for_asm, warning_with_file_and_line): Likewise.
(warning_with_decl, warning_for_asm, warning): Likewise.

From-SVN: r6451