Add ITT instrumentation for slab and cuckoo (twitter#238)

To build pelikan with ITT instrumentation you should have the Intel®
VTune™Amplifier installed and source the amplxe-vars.sh.
Run cmake with the -DHAVE_ITT_INSTRUMENTATION=yes option.

Co-authored-by: Michal Biesek <michal.biesek@intel.com>
Co-authored-by: Piotr Balcer <piotr.balcer@intel.com>

CMakeLists.txt

@@ -48,6 +48,7 @@ option(HAVE_RUST "build features written in rust" OFF)
 option(RUST_USE_MUSL "build rust deps against musl" OFF)
 option(BUILD_AND_INSTALL_CHECK "build our own version of check and link against it" OFF)
 option(USE_PMEM "build persistent memory features" OFF)
+option(HAVE_ITT_INSTRUMENTATION "instrument code with ITT API" OFF)
 
 option(COVERAGE "code coverage" OFF)