Add test for Khronos Group license and whitelist it.

third_party/devscripts/licensecheck.pl

Index: third_party/devscripts/licensecheck.pl
diff --git a/third_party/devscripts/licensecheck.pl b/third_party/devscripts/licensecheck.pl
index bd60603ee564952f83c5f7e0d2253c77bd875056..701fe4a933e0139a04273a96e9f202702ef2dd69 100755
--- a/third_party/devscripts/licensecheck.pl
+++ b/third_party/devscripts/licensecheck.pl
@@ -577,6 +577,10 @@ sub parselicense($) {
         $license = $license . "with libtool exception";
     }
 
+    if ($licensetext =~ /The Khronos Group Inc. All Rights Reserved./) {

[Paweł Hajdan Jr., 2013/03/25 18:29:45]

This is not enough. Let's remove this and match on "These materials are
protected by copyright laws and contain material proprietary to the Khronos
Group, Inc. You may use these materials for implementing Khronos specifications,
without altering or removing 
any trademark, copyright or other notice from the specification." instead.

+        $license = $license . "Khronos Group";
+    }
+
     $license = "UNKNOWN" if (!length($license));
 
     # Remove trailing spaces.