Python: wrapt: Clarify BSD license variant

The License of python wrapt is BSD-2-Clause.

Signed-off-by: Christophe Priouzeau <christophe.priouzeau@st.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-python/recipes-devtools/python/python-wrapt.inc

@@ -1,6 +1,6 @@
 SUMMARY = "A Python module for decorators, wrappers and monkey patching."
 HOMEPAGE = "http://wrapt.readthedocs.org/"
-LICENSE = "BSD"
+LICENSE = "BSD-2-Clause"
 SECTION = "devel/python"
 LIC_FILES_CHKSUM = "file://LICENSE;md5=fdfc019b57affbe1d7a32e3d34e83db4"