update bison version dependency

need at least 2.4 because we use
per-type %destructor that was added after 2.3 in 2.3a

sql/CMakeLists.txt

@@ -65,7 +65,7 @@ ADD_CUSTOM_COMMAND(
   DEPENDS gen_lex_token
 )
 
-FIND_PACKAGE(BISON 2.0)
+FIND_PACKAGE(BISON 2.4)
 
 ADD_CUSTOM_COMMAND(
   OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/yy_mariadb.yy