bitbake: fetch2/npm: ignore unknown headers in tarballs

Tarballs that are fetched down via npm repositories seem to often have
unknown headers. This doesn't affect our ability to extract the contents
though so we don't really care to see those warnings.

(Bitbake rev: b38975103e52a0c25e9ad9032c8cca1c47cbdcc2)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/fetch2/npm.py

@@ -108,7 +108,7 @@ class Npm(FetchMethod):
         file = data[pkg]['tgz']
         logger.debug(2, "file to extract is %s" % file)
         if file.endswith('.tgz') or file.endswith('.tar.gz') or file.endswith('.tar.Z'):
-            cmd = 'tar xz --strip 1 --no-same-owner -f %s/%s' % (dldir, file)
+            cmd = 'tar xz --strip 1 --no-same-owner --warning=no-unknown-keyword -f %s/%s' % (dldir, file)
         else:
             bb.fatal("NPM package %s downloaded not a tarball!" % file)