docs/manual: document the new patch naming convention

To ease generating patches, we now use a naming convention that is in
line with what git-format-patch does, that is:
  - do not prefix patches with the package name
  - prefix patches with a 4-digit mber
  - start numbering at 0001

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Peter Korsgaard <jacmet@uclibc.org>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Thomas De Schampheleire <patrickdepinguin@gmail.com>
Cc: Arnout Vandecappelle <arnout@mind.be>
Cc: Samuel Martin <s.martin49@gmail.com>
package/acl: rename patches according to the new policy

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
package/acpid: rename patches according to the new policy

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
package/aiccu: rename patches according to the new policy

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
package/aircrack-ng: rename patches according to the new policy

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
package/alsa-lib: rename patches according to the new policy

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
package/alsamixergui: rename patches according to the new policy

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
package/am33x-cm3: rename patches according to the new policy

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
package/apr-util: rename patches according to the new policy

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
package/argp-standalone: rename patches according to the new policy

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
package/at: rename patches according to the new policy

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
package/attr: rename patches according to the new policy

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
package/aumix: rename patches according to the new policy

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
package/autoconf: rename patches according to the new policy

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
package/automake: rename patches according to the new policy

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
package/avahi: rename patches according to the new policy

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
package/bash: rename patches according to the new policy

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
package/beecrypt: rename patches according to the new policy

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
package/bellagio: rename patches according to the new policy

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
package/bind: rename patches according to the new policy

Signed-off-by: Samuel Martin <s.martin49@gmail.com>