common: add rules to run jemalloc tests

- add rules to run jemalloc tests separately
- run debug and nondebug jemalloc tests
- run jemalloc tests before vmem tests
Merge pull request #33 from plebioda/add-rules-to-run-jemalloc-tests

common: add rules to run jemalloc tests
common: NVML renaming and library splitting

Rename functions in library and split libpmem.
-Rename typdefs: PMEMblkpool, PMEMlogpool, PMEMobjpool
-Split libpmem into libpmem, libpmemblk, libpmemlog, libpmemobj
-Rename trn => obj and add pmemobj fake implementation
-Add benchmark building to make check target
-Change functions _map() to _pool_open()
-Update scope tests