Remove STANDARD  define when compile udf_example.so


mysql-test/r/udf.result:
  Update results
mysql-test/t/udf.test:
  Update test try to create, use and drop a non existing function
  Disable the result from "reverse_lookup" as it is config dependent
sql/Makefile.am:
  Remove the "STANDARD" define when compiling udf_example.so