package/genpart: fix typos and grammar in patch description

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
[yann.morin.1998@free.fr: also fix grammar]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/genpart/0001-fix-return-code.patch

@@ -1,7 +1,7 @@
-genpart: return 0 if partition writen OK, with no do_magic
+genpart: return 0 if partition written OK, with no do_magic
 
-If do_magic is false, we don't won't write the 0xaa55 magic.
-However, if we succesfully wrote the partition entry, we still
+If do_magic is false, we won't write the 0xaa55 magic.
+However, if we successfully wrote the partition entry, we still
 want to return 0 to indicate success.
 
 Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>