Update extension count

Author: mszabo-wikia

hphp/util/hphp-config.h.in

@@ -88,7 +88,7 @@ ${HHVM_COMPILES_DEFINE_STRING}
 #endif
 
 #ifdef USE_CMAKE
-# if ${HHVM_EXTENSION_COUNT} != 100
+# if ${HHVM_EXTENSION_COUNT} != 101
 #  error You need to update the config file for the new builtin extension, and add the define to the FB section
 # endif
 ${HHVM_EXTENSIONS_ENABLED_DEFINE_STRING}