Add an rpmlintrc file

gn.rpmlintrc

@@ -0,0 +1,8 @@
+# This is a maintainer script, so it should indeed be executable:
+addFilter(r' strange-permission update-version 775$')
+# The source URL exports a tarball directly from git; while the contents are
+# stable since it references a particular commit, the tarball checksum and even
+# file size are different every time. I haven’t looked too closely, but I
+# suspect this is due to timestamps in the tar stream being based on the access
+# time rather than the time of the commit.
+addFilter(r' file-size-mismatch gn-[0-9A-Fa-f]{8}\.tar\.gz = ')