recipetool: add support for Qt5 to meta-qt5

Having in recent OE-Core master added build system extension capabilities to recipetool, add a module in meta-qt5 which uses this to enable extraction of Qt5 dependencies from cmake, qmake and autoconf files. It's by no means perfect but does do something useful if you add a recipe for a Qt5-using piece of software using recipetool create or devtool add.

---
 lib/recipetool/__init__.py   |   3 +
 lib/recipetool/create_qt5.py | 162 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 165 insertions(+)
 create mode 100644 lib/recipetool/__init__.py
 create mode 100644 lib/recipetool/create_qt5.py

new file mode 100644
index 0000000..8eda927
@@ -0,0 +1,3 @@
+# Enable other layers to have modules in the same named directory
+from pkgutil import extend_path
+__path__ = extend_path(__path__, __name__)

2.5.0