autoconf-archive: simplify and fix recipe

The COPYING file specifies pure GPLv3, not GPLv2 & GPLv3. There is
also the COPYING.EXCEPTION file with the autotools exception, which
gets ignored here in the recipe to keep it simpler.

All of the explicit dependencies seem unnecessary, and RDEPENDS_${PN}
doesn't do anything for native recipes either, so all of that gets
removed.

It also built fine without the m4 and parallel build workarounds.

There's no need to have a separate .inc file.

(From OE-Core rev: 5002004b891895654cbad53555ee46e2ed188630)

Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/autoconf-archive/autoconf-archive.inc

@@ -1,13 +0,0 @@
-LICENSE = "GPLv3"
-HOMEPAGE = "http://www.gnu.org/software/autoconf-archive/"
-SECTION = "devel"
-
-DEPENDS += "m4-native"
-DEPENDS_class-native = "m4-native gnu-config-native"
-DEPENDS_class-nativesdk = "m4-nativesdk gnu-config-nativesdk"
-
-RDEPENDS_${PN} = "m4 gnu-config"
-
-SRC_URI = "${GNU_MIRROR}/${BPN}/${BPN}-${PV}.tar.xz"
-
-inherit autotools

meta/recipes-devtools/autoconf-archive/autoconf-archive_2016.09.16.bb

@@ -1,13 +1,13 @@
-require autoconf-archive.inc
-
-
-PARALLEL_MAKE = ""
-
-LICENSE = "GPLv2 & GPLv3"
+SUMMARY = "a collection of freely re-usable Autoconf macros"
+HOMEPAGE = "http://www.gnu.org/software/autoconf-archive/"
+SECTION = "devel"
+LICENSE = "GPLv3"
 LIC_FILES_CHKSUM = "file://COPYING;md5=d32239bcb673463ab874e80d47fae504"
 
+SRC_URI = "${GNU_MIRROR}/${BPN}/${BPN}-${PV}.tar.xz"
 SRC_URI[md5sum] = "bf19d4cddce260b3c3e1d51d42509071"
 SRC_URI[sha256sum] = "e8f2efd235f842bad2f6938bf4a72240a5e5fcd248e8444335e63beb60fabd82"
 
-EXTRA_OECONF += "ac_cv_path_M4=m4"
+inherit autotools
+
 BBCLASSEXTEND = "native nativesdk"