package/mongrel2: bump to version 1.12.2

- Refresh second patch
- Drop third patch (already in version)
- An external mbedtls can be used since version 1.12.0 and
  https://github.com/mongrel2/mongrel2/commit/5be7fc9c90fd5c8caa233770b7e2cdff67b4bae2
  so use it with an upstream patch and drop
  MONGREL2_POST_CONFIGURE_HOOKS

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
7 files changed