linux-meta: Fixed problem with sed replacement

helpers/make-linux-meta

@@ -25,7 +25,7 @@ for i in omap powerpc powerpc-smp powerpc64-smp
 do
     rm debian/control.d/$i
 done
-sed 's/\(, \)*linux-firmware//; s/Linux /Linux-libre /g; /linux-backports/,/up-to-date when upgrading/d' debian/control.d/* debian/control.common -i
+sed 's/\(, \)*linux-firmware//; s/Linux /Linux-libre /g; /Package.*linux-backports/,/up-to-date when upgrading/d' debian/control.d/* debian/control.common -i
 rm debian/control
 debian/rules debian/control