Buildsystem/Linux: Fix linking of a long lost little child : jemalloc (yes, it has returned, and is now actively linked again)

--HG--
branch : trunk

cmake/platform/unix/settings.cmake

@@ -1,3 +1,8 @@
+# Package overloads - Linux
+if(CMAKE_SYSTEM_NAME MATCHES "Linux")
+  set(JEMALLOC_LIBRARY "jemalloc")
+endif()
+
 # set default configuration directory
 if( NOT CONF_DIR )
   set(CONF_DIR ${CMAKE_INSTALL_PREFIX}/etc)