python: Add nativesdk wrapper to handle terminfo

Currently if you build nativesdk-python, install it and try and run it, you see it search in the default nativesdk path for terminfo files when the readline module is used.

If terminfo files cannot be found, or if the ones found are incorrect, the system may emit control characters which confuse commandline processing.

This patch sets the TERMINFO_DIRS variable to ensure the correct locations are searched for terminfo files, starting with the nativesdk terminfo files and falling back to the host systtem's.

---

index 5150e52..59d189d 100644
@@ -115,6 +115,10 @@ do_install() {
 	oe_multilib_header python${PYTHON_MAJMIN}/pyconfig.h
 }
 
+do_install_append_class-nativesdk () {
+	create_wrapper ${D}${bindir}/python2.7 TERMINFO_DIRS='${sysconfdir}/terminfo:/etc/terminfo:/usr/share/terminfo:/usr/share/misc/terminfo:/lib/terminfo'
+}
+
 SSTATE_SCAN_FILES += "Makefile"
 PACKAGE_PREPROCESS_FUNCS += "py_package_preprocess"