Fix license check for GL headers

tools/checklicenses/checklicenses.py

Index: tools/checklicenses/checklicenses.py
diff --git a/tools/checklicenses/checklicenses.py b/tools/checklicenses/checklicenses.py
index 84d3273862a521eb9d4928358958771dbb8fa104..6383d99545fa8cbc0a294c0785fd506cf5250f37 100755
--- a/tools/checklicenses/checklicenses.py
+++ b/tools/checklicenses/checklicenses.py
@@ -78,6 +78,7 @@ WHITELISTED_LICENSES = [
     'Public domain',
     'libpng',
     'zlib/libpng',
+    'SGI Free Software License B',
 ]
 
 
@@ -117,20 +118,6 @@ PATH_SPECIFIC_WHITELISTED_LICENSES = {
         'UNKNOWN',
     ],
 
-    # http://crbug.com/98097
-    'gpu/GLES2': [
-        'UNKNOWN',
-    ],
-    'gpu/KHR': [
-        'UNKNOWN',
-    ],
-    'gpu/gles2_conform_support/egl/native/EGL': [
-        'UNKNOWN',
-    ],
-    'gpu/EGL': [
-        'UNKNOWN',
-    ],
-
     'native_client': [  # http://crbug.com/98099
         'UNKNOWN',
     ],