Add a newline in output messages

Hi,
GDB prints two warnings in one single line, as below:

 (gdb) p 1.2
 $1 = 1.2
 (gdb) enable $1.2
 History value must have integer type.Bad breakpoint number '$1'

This patch adds '\n' at the end of message.

gdb:

2014-03-06  Yao Qi  <yao@codesourcery.com>

	* cli/cli-utils.c (get_number_trailer): Add '\n' at the end of
	message.

gdb/cli/cli-utils.c

@@ -50,7 +50,7 @@ get_number_trailer (char **pp, int trailer)
 	    retval = value_as_long (val);
 	  else
 	    {
-	      printf_filtered (_("History value must have integer type."));
+	      printf_filtered (_("History value must have integer type.\n"));
 	      retval = 0;
 	    }
 	}