boot/lpc32xxcdl: rename patches with the proper naming convention

As reported by check-package (by calling it directly):
use name <number>-<description>.patch

Output of:
make lpc32xxcdl-dirclean lpc32xxcdl-patch | grep 'Patching\|Applying'

Before:
>>> lpc32xxcdl 2.11 Patching
Applying lpc32xxcdl-2.11-compiler_name.patch using patch:
Applying lpc32xxcdl-2.11-delete_redundant_files.patch using patch:
Applying lpc32xxcdl-2.11-libnosys_gnu.patch using patch:
Applying lpc32xxcdl-2.11-slashes.patch using patch:

After:
>>> lpc32xxcdl 2.11 Patching
Applying 0001-compiler_name.patch using patch:
Applying 0002-delete_redundant_files.patch using patch:
Applying 0003-libnosys_gnu.patch using patch:
Applying 0004-slashes.patch using patch:

Signed-off-by: Ricardo Martincoski <ricardo.martincoski@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>