Update 2015/howe/.gitignore

The make test rule ends up creating quite a few temporary files so I
have added them to the .gitignore. Perhaps I should add just *.tmp but I
added the globs individually instead.

2015/howe/.gitignore

@@ -5,3 +5,20 @@ prog
 prog.alt
 war-and-peace.txt
 whey.tmp
+1.tmp
+123.tmp
+A.tmp
+ABCABBA.tmp
+ABCD.tmp
+ABCDE.tmp
+ABCDEF.tmp
+ABCDEFGHIJK.tmp
+ABCEFGIJKDEFGHIJK.tmp
+ABXYEFCD.tmp
+ACBDEACBED.tmp
+ACDBECFD.tmp
+ACEBDABBABED.tmp
+CBABAC.tmp
+EMPTY.tmp
+patch.tmp
+ABD.tmp