Log Message:
Update to 4.1:

Version 4.1 (05 Oct 2014)

A complete list of bugs fixed in this version is available here:

http://sv.gnu.org/bugs/index.php?group=make&report_id=111&fix_release_id=105&set=custom

* New variables: $(MAKE_TERMOUT) and $(MAKE_TERMERR) are set to non-empty
  values if stdout or stderr, respectively, are believed to be writing to a
  terminal.  These variables are exported by default.

* Allow a no-text-argument form of the $(file ...) function.  Without a text
  argument nothing is written to the file: it is simply opened in the
  requested mode, then closed again.

* Change the fatal error for mixed explicit and implicit rules, that was
  introduced in GNU make 3.82, to a non-fatal error.  However, this syntax is
  still deprecated and may return to being illegal in a future version of GNU
  make.  Makefiles that rely on this syntax should be fixed.
  See https://savannah.gnu.org/bugs/?33034