reword the misleading message.


mysql-test/r/sp-error.result:
  Test results fixed (Bug#15206)
mysql-test/r/sp.result:
  Test results fixed (Bug#15206)
mysql-test/r/type_decimal.result:
  Disable an unportable test case (Bug#7670)
mysql-test/r/variables.result:
  Test results fixed (Bug#15206)
mysql-test/r/view_grant.result:
  Test results fixed (Bug#15206)
mysql-test/t/type_decimal.test:
  Remove an unportable (QNX) test case (Bug#7670). The test output
  depends on system-specific sprintf() implementation.
  The original complain was about erroneous conversion to long long,
  which was applied prior to conversion to double: but the expected
  behaviour can't be achieved until we have an own string -> double
  conversion function.