package/gcc: fix check-package warnings in patches

package/gcc/11.3.0/0005-rs6000-Improve-.machine.patch:4: generate your patches with 'git format-patch -N'
package/gcc/11.3.0/0006-rs6000-Do-not-use-rs6000_cpu-for-.machine-ppc-and-pp.patch:4: generate your patches with 'git format-patch -N'

Signed-off-by: Arnout Vandecappelle <arnout@mind.be>
(cherry picked from commit 4124d47b0b517c13d55e3ec738070f3cd24d1ac8)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/gcc/11.3.0/0005-rs6000-Improve-.machine.patch

@@ -1,7 +1,7 @@
 From ca2c3a7d3db7a699c358d3408f820396dd536fc8 Mon Sep 17 00:00:00 2001
 From: Segher Boessenkool <segher@kernel.crashing.org>
 Date: Tue, 1 Mar 2022 17:04:29 +0000
-Subject: [PATCH 5/6] rs6000: Improve .machine
+Subject: [PATCH] rs6000: Improve .machine
 
 This adds more correct .machine for most older CPUs.  It should be
 conservative in the sense that everything we handled before we handle at

package/gcc/11.3.0/0006-rs6000-Do-not-use-rs6000_cpu-for-.machine-ppc-and-pp.patch

@@ -1,7 +1,7 @@
 From 6de33ed642f119f1e2543095dd56e4a94f97c27f Mon Sep 17 00:00:00 2001
 From: Segher Boessenkool <segher@kernel.crashing.org>
 Date: Fri, 11 Mar 2022 21:15:18 +0000
-Subject: [PATCH 6/6] rs6000: Do not use rs6000_cpu for .machine ppc and ppc64
+Subject: [PATCH] rs6000: Do not use rs6000_cpu for .machine ppc and ppc64
  (PR104829)
 
 Fixes: 77eccbf39ed5