python3-scons{-native}: upgrade 3.1.1 -> 3.1.2

THis release is a mix of improvements and fixes:
https://github.com/SCons/scons/blob/3.1.2/src/RELEASE.txt

* Changed to inherit pypi rather than relying on SOURCEFORGE_MIRROR.
* Add SRC_URI for LICENSE file (not included in pypi tarball).
* Make it more obvious that RDEPENDS are for class-target and
  drop empty RDEPENDS from -native
* python3-scons-native now DEPENDS on python3-setuptools-native

* Tested with core-image-base + packagegroup-core-buildessential
  with "scons" oe-selftest via testimage.
* Tested build of "serf" (which uses python3-scons-native via the
  scons.bbclass).

License-Update: Added "MIT License" text, updated copyright years

(From OE-Core rev: 44b46ae6c65448901477def57a45d5a4ecc2d246)

Signed-off-by: Tim Orling <timothy.t.orling@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/python/python3-scons_3.1.2.bb

@@ -0,0 +1,33 @@
+SUMMARY = "Software Construction tool (make/autotools replacement)"
+SECTION = "devel/python"
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://${WORKDIR}/LICENSE;md5=e14e1b33428df24a40a782ae142785d0"
+
+# pypi package does not have a valid license file
+SRC_URI += "https://raw.githubusercontent.com/SCons/scons/${PV}/LICENSE;name=license"
+
+SRC_URI[md5sum] = "f9c4ad06dcf1427be95472eaf380c81a"
+SRC_URI[sha256sum] = "8aaa483c303efeb678e6f7c776c8444a482f8ddc3ad891f8b6cdd35264da9a1f"
+SRC_URI[license.md5sum] = "e14e1b33428df24a40a782ae142785d0"
+SRC_URI[license.sha256sum] = "72ed889165fb28378cadac14552be4a959f1ebab6b148abb5dd2b49712c3c6f6"
+
+S = "${WORKDIR}/scons-${PV}"
+
+UPSTREAM_CHECK_URI = "http://scons.org/pages/download.html"
+UPSTREAM_CHECK_REGEX = "(?P<pver>\d+(\.\d+)+)\.tar"
+
+inherit pypi setuptools3
+
+do_install_prepend() {
+    sed -i -e "1s,#!.*python.*,#!${USRBINPATH}/env python3," ${S}/script/*
+}
+
+RDEPENDS_${PN}_class-target = "\
+  python3-core \
+  python3-fcntl \
+  python3-io \
+  python3-json \
+  python3-shell \
+  python3-pickle \
+  python3-pprint \
+  "