I humbly submit my first patch for feedback and consideration.  My
apologies in advance if I am not following the proper protocol for a
patch email, I'm new to this (I did look at several other [PATCH]
emails.)

Rationale: I'm porting Emacs to a new platform, and we need to have a
file extension on all
executables for this platform when we run the executables. In several
places in the makefile,
no extension is used.  This catches the places that I ran into, and
uses the {EXEEXT}
extension to make sure the proper file name extension is used to
launch programs by.

Motivating case:
I'm porting Emacs to the Chromebook using the NaCl API, and we need
for executables to have the .nexe extension.  Even when running Emacs
during the build process on the host Linux build machine  (for
instance to create leim-list.el or build documentation), we need the
proper extension so that the machine emulator is not confused.

I have tested this by building and running Emacs on Ubuntu 14 (only),
let me know if it is expected to test in more places.

All feedback and comments are welcome.

The patch file is below, here is a text version of the diff (since it
is a small patch)

diff --git a/leim/Makefile.in b/leim/Makefile.in
index 573acf7..70f2aca 100644
--- a/leim/Makefile.in
+++ b/leim/Makefile.in
@@ -47,7 +47,7 @@ unexport EMACSDATA EMACSDOC EMACSPATH

 # Which Emacs to use to convert TIT files to Emacs Lisp files,
 # and generate the file leim-list.el.
-EMACS = ../src/emacs
+EMACS = ../src/emacs{EXEEXT}

 # How to run Emacs.
 # Prevent any setting of EMACSLOADPATH in user environment causing problems.
diff --git a/lib-src/Makefile.in b/lib-src/Makefile.in
index d2705e7..d08aac5 100644
--- a/lib-src/Makefile.in
+++ b/lib-src/Makefile.in
@@ -21,7 +21,7 @@
 SHELL = @SHELL@

 # Following ../lisp/Makefile.in.
-EMACS = ../src/emacs
+EMACS = ../src/emacs{EXEEXT}
 EMACSOPT = -batch --no-site-file --no-site-lisp

 # ==================== Things `configure' will edit ====================
diff --git a/lisp/Makefile.in b/lisp/Makefile.in
index e5cfc63..3b0d109 100644
--- a/lisp/Makefile.in
+++ b/lisp/Makefile.in
@@ -47,7 +47,7 @@ am__v_GEN_1 =
 # We never change directory before running Emacs, so a relative file
 # name is fine, and makes life easier.  If we need to change
 # directory, we can use emacs --chdir.
-EMACS = ../src/emacs
+EMACS = ../src/emacs{EXEEXT}

 # Command line flags for Emacs.