Bundle jemalloc with JDBC Driver

[brianwyka]

Fixes #63

[lnkuiper]

Thanks for re-opening this! LGTM

[brianwyka]

@lnkuiper , keep on running into conflicts. Any way to get this merged after opening to avoid continuous conflict resolution?

[lnkuiper]

@brianwyka This repo syncs with the main repo every night, so unless we merge quickly, we will have merge conflicts. I think that because adding jemalloc adds a bunch of files, the build script changes, and the conflicts are hard to avoid. I will ask if we can merge this more quickly or if there is any other way to avoid it

[staticlibs]

jemalloc was brought into JDBC with #133 and #171 PRs, closing this one as completed.