Add a.out to .gitignore.

Suggested by Lee Duhem in:
http://lists.gnu.org/archive/html/emacs-devel/2014-11/msg01665.html
* .gitignore: Add a.out.
Move *.log next to *.tmp, since it's generic.
Put *.exe before non-generics.

.gitignore

@@ -88,7 +88,8 @@ lisp/subdirs.el
 .deps/
 deps/
 
-# Temporaries.
+# Logs and temporaries.
+*.log
 *.tmp
 
 # Time stamps.
@@ -108,6 +109,8 @@ oo-spd/
 src/*.map
 
 # Executables.
+*.exe
+a.out
 lib-src/blessmail
 lib-src/ctags
 lib-src/ebrowse
@@ -124,7 +127,6 @@ src/bootstrap-emacs
 src/emacs
 src/emacs-[0-9]*
 src/temacs
-*.exe
 
 # Character-set info.
 admin/charsets/*.el
@@ -146,7 +148,6 @@ lisp/international/uni-*.el
 *.info
 *.ky
 *.kys
-*.log
 *.op
 *.ops
 *.pdf

ChangeLog

+2014-11-20  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Add a.out to .gitignore.
+	Suggested by Lee Duhem in:
+	http://lists.gnu.org/archive/html/emacs-devel/2014-11/msg01665.html
+	* .gitignore: Add a.out.
+	Move *.log next to *.tmp, since it's generic.
+	Put *.exe before non-generics.
+
 2014-11-19  Eli Zaretskii  <eliz@gnu.org>
 
 	* .gitignore: Resurrect Windows-specific ignorables lost in last