tinyxml: fix when not using anytoolchain
tinyxml: fix when not using anytoolchain

Note that client code should use

  #include <tinyxml.h>

not

  #include <tinyxml/tinyxml.h>

Change-Id: I99fa217d914d61a6a6675785e63389763314fcdd

aldebaran/qibuild,aldebaran/qibuild,dmerejkowsky/qibuild,dmerejkowsky/qibuild,dmerejkowsky/qibuild,aldebaran/qibuild,dmerejkowsky/qibuild,dmerejkowsky/qibuild,aldebaran/qibuild