package/rocksdb: bump to version 6.13.3

package/rocksdb: bump to version 6.13.3

- Refresh first patch
- Replace second patch (this new iteration of previous patch has not
  been merged and does not apply cleanly on current version)
- Update hash of README.md (CircleCI gadget added with
  https://github.com/facebook/rocksdb/commit/63b59f21d9971fc941e3ee2244783a3c16bd5ad4)
- LTO is supported since version 6.12.6 and
  https://github.com/facebook/rocksdb/commit/c0c33a4854587e412742841f199edd4616be6c00
- DESTDIR and PREFIX are supported since version 6.13.2 and
  https://github.com/facebook/rocksdb/commit/1e59800718b29d4a762b8ac356767a701f968a4d

https://github.com/facebook/rocksdb/releases/tag/v6.13.3

Fixes:
 - http://autobuild.buildroot.org/results/a9798bb279a668a266c472fb026b68dbccf50431

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