Percona 5.7.21 on Ubuntu - wrong library location

[dipyalov]

When you build pinba for percona 5.7.21 on ubuntu 16.04, linker fails on the final step as it can't find a library at the location percona-source/libservices/libmysqlservices.a

But the library exists at percona-source/archive_output_directory/

So the workaround cp percona-source/archive_output_directory/libmysqlservices.a percona-source/libservices/ does the trick.