Fix FEATURES mask.

.travis.yml

@@ -662,7 +662,7 @@ env:
       ENABLE_LUA=NO
       ENABLE_DUKTAPE=NO
       NO_CACHING=NO
-    - FEATURES=32
+    - FEATURES=31
       BUILD_SHARED=YES
       NO_FILES=NO
       ENABLE_SSL=YES
@@ -672,7 +672,7 @@ env:
       ENABLE_LUA=YES
       ENABLE_DUKTAPE=YES
       NO_CACHING=NO
-    - FEATURES=32
+    - FEATURES=31
       BUILD_SHARED=YES
       NO_FILES=NO
       ENABLE_SSL=YES