Set explicit font size

This might be bad style, but cgit really needed smaller fonts.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

cgit.css

@@ -1,6 +1,6 @@
 body {
 	font-family: arial;
-	font-size: normal;
+	font-size: 11pt;
 	background: white;
 	padding: 0em;
 	margin: 0em;