buildcpio.py: Switch to using cpio-2.15

This helps in getting it building with newer architectures like riscv32
since it has upgraded gnulib over 2.14 which has the needed fixes.

Drop the -fno-common workaround as it is already applied to cpio

drop --disable-maintainer-mode

Fixes
configure: WARNING: unrecognized options: --disable-maintainer-mode

(From OE-Core rev: 18d303497089d3a7a893ee0eec5b0f0c78cca06d)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/runtime/cases/buildcpio.py

@@ -14,7 +14,7 @@ class BuildCpioTest(OERuntimeTestCase):
 
     @classmethod
     def setUpClass(cls):
-        uri = 'https://downloads.yoctoproject.org/mirror/sources/cpio-2.14.tar.gz'
+        uri = 'https://downloads.yoctoproject.org/mirror/sources/cpio-2.15.tar.gz'
         cls.project = TargetBuildProject(cls.tc.target,
                                          uri,
                                          dl_dir = cls.tc.td['DL_DIR'])
@@ -29,10 +29,6 @@ class BuildCpioTest(OERuntimeTestCase):
     @OEHasPackage(['autoconf'])
     def test_cpio(self):
         self.project.download_archive()
-        self.project.run_configure('--disable-maintainer-mode')
-        # This sed is needed until
-        # https://git.savannah.gnu.org/cgit/cpio.git/commit/src/global.c?id=641d3f489cf6238bb916368d4ba0d9325a235afb
-        # is in a release.
-        self.project._run(r'sed -i -e "/char \*program_name/d" %s/src/global.c' % self.project.targetdir)
+        self.project.run_configure()
         self.project.run_make()
         self.project.run_install()