$NetBSD$

Fixes portability failure.

--- utils/lit/utils/check-coverage.orig	2013-05-04 12:14:35.000000000 +0000
+++ utils/lit/utils/check-coverage
@@ -9,13 +9,13 @@ if [ ! -f setup.py ] || [ ! -d lit ]; th
 fi
 
 # Parse command line arguments.
-if [ "$1" == "--generate-html" ]; then
+if [ "$1" = "--generate-html" ]; then
     GENERATE_HTML=1
     shift
 fi
 
 # If invoked with no arguments, run all the tests.
-if [ $# == "0" ]; then
+if [ $# = "0" ]; then
     set -- "tests"
 fi
 
