newt: enable native builds

(From OE-Core rev: b4be1b3cec07c0ec167959994e9250dcca20c273)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/newt/libnewt-python_0.52.18.bb

@@ -25,3 +25,5 @@ PACKAGES_remove = "whiptail"
 
 FILES_${PN} = "${PYTHON_SITEPACKAGES_DIR}/*"
 FILES_${PN}-dbg += "${PYTHON_SITEPACKAGES_DIR}/.debug/"
+
+BBCLASSEXTEND = "native"

meta/recipes-extended/newt/libnewt_0.52.18.bb

@@ -52,3 +52,5 @@ do_compile_prepend() {
 }
 
 FILES_whiptail = "${bindir}/whiptail"
+
+BBCLASSEXTEND = "native"