Ticket 48377 - Bundle jemalloc with Directory Server
    
    Description:  Updated spec files to download the latest supported
                  version of jemalloc source code, and build it.  Then
                  include the library in the server's library directory
                  (/usr/lib64/dirsrv).  Also, the bundled jemalloc library
                  can coexist with any existing jemalloc package.  This
                  allows us to control the supported version that we ship.
    
                  Then in /etc/sysconfig/dirsrv added a commented LD_PRELOAD
                  line that is pre-set for the server.
    
                  Also fixed rpm.mk so that it looked at the proper spec file
                  for nunc-stans and jemalloc configuraton.
    
    https://fedorahosted.org/389/ticket/48377
    
    Reviewed by: rmeggins, wibrown, and nhosoi(Thanks!!!)