Last line of lib-src/Makefile.in breaks gcc -E -traditional

[Eli Zaretskii]

This last line of lib-src/Makefile.in was added recently:

  ### Makefile ends here

Why was it added?  ChangeLog is silent about it, and so is "cvs log".

This line breaks the preprocessor, since it is in the part of
Makefile.in that begins with this comment:

  # ========================== start of cpp stuff =======================
  /* From here on, comments must be done in C syntax.  */