Ignore svnversion.h, it's auto-generated. Ignore lemon and except.[ch], they're

imported from upstreams with correct licensing but without a useful header (and
there's no particular reason to carry that delta).

svn path=/trunk/; revision=52017

tools/checklicenses.py

@@ -137,6 +137,18 @@ PATH_SPECIFIC_WHITELISTED_LICENSES = {
     'packaging/macosx': [
         'UNKNOWN',
     ],
+    'svnversion.h': [
+        'UNKNOWN',
+    ],
+    'tools/lemon': [
+        'UNKNOWN',
+    ],
+    'epan/except.c': [
+        'UNKNOWN',
+    ],
+    'epan/except.h': [
+        'UNKNOWN',
+    ],
 }