Support lz4 and zstd compression by static link

http://jenkins.percona.com/view/5.7/job/mysql-5.7-param/1034/

http://jenkins.percona.com/view/5.7/job/mysql-5.7-param/1043/

https://github.com/percona/percona-server/pull/1815

So here is a jenkins run using mtr combinations : http://jenkins.percona.com/view/5.7/job/mysql-5.7-param/1034/

The combinations of compression used were :
rocksdb_default_cf_options=compression_per_level=kNoCompression
rocksdb_default_cf_options=compression_per_level=kZlibCompression
rocksdb_default_cf_options=compression_per_level=kLZ4Compression
rocksdb_default_cf_options=compression_per_level=kZSTDNotFinalCompression;compression_opts=-14:4:0

This means that each test in the rocksdb, rocksdb.rpl, and rocksdb.sys_vars suite was run once with each of the above column family compression settings.

The failed tests are the same as the failed tests I have run locally and are expected failures due to the option change (i.e. recorded results of things like "SHOW VARIABLES LIKE 'rocksdb_default_cf_options'") and other behavior changes that occur as a result of compression (smaller file sizes, different compaction behaviors, etc...).

So I am pretty confident in the compression at this point and do welcome any additional testing or mtr additions for some kind of lightweight CI/regression testing.

Your branch LGTM (while the decision does not, but I root for it to be the correct one given the circumstances)

Work is here https://github.com/georgelorchpercona/percona-server/tree/ps-5.7-MYR-28
jenkins : http://jenkins.percona.com/view/5.7/job/mysql-5.7-param/1020/

See PQA-161

Temporarily disabled system libs in cmake and disabled rocksdb_compression_zstd test.

5.6
http://jenkins.percona.com/view/PS%205.6/job/percona-server-5.6-param/1451/
https://github.com/percona/percona-server/pull/1105

5.7
http://jenkins.percona.com/view/5.7/job/mysql-5.7-param/476/
https://github.com/percona/percona-server/pull/1118