* ldgram.y (exclude_name_list): Don't require a comma to separate

* ldgram.y (exclude_name_list): Don't require a comma to separate
list entries; the lexer considers commas to be valid part of a
filename, so in something like `foo, bar' the comma is considered
part of the first filename, `foo,'.
* ld.texinfo: Update section on EXCLUDE_FILE lists.