[reSIProcate] rutil dependencies on resip/stack

[Jason Fischl <jason@xxxxxxxxxxx>]

It looks like there are some incorrect dependencies in the rutil
library. I'm working on resolving them. Here's what I'm doing.

Move from resip/stack to rutil: 
- GenericIPAddress
- external/AsyncID.cxx

Move from rutil to resip/stack: 
- FlowId
- Tuple
- ValueFifo

Move from resip/stack/test to rutil/test
test/testCoders.cxx

  A            ?             test/testCountStream.cxx
  A            ?             test/testData.cxx
  A            ?             test/testDataPerformance.cxx
  A            ?             test/testDataStream.cxx
  A            ?             test/testDnsUtil.cxx
  A            ?             test/testFifo.cxx
  A            ?             test/testFileSystem.cxx
  A            ?             test/testFlowId.cxx
  A            ?             test/testInserter.cxx
  A            ?             test/testIntrusiveList.cxx
  A            ?             test/testLogger.cxx
  A            ?             test/testMD5Stream.cxx
  A            ?             test/testMem.cxx
  A            ?             test/testRandomHex.cxx
  A            ?             test/testSHA1Stream.cxx
  A            ?             test/testSharedPtr.cxx
  A            ?             test/testThreadIf.cxx