MDEV-13403 Mariadb (with TokuDB) excessive memory usage/leak

In RPM/DEB packages - always ld-preload jemalloc, instead
of linking ha_tokudb.so with it.

Keep linking in bintars, because they don't install cnf files
in the correct locations.

debian/control

@@ -477,6 +477,7 @@ Description: OQGraph storage engine for MariaDB
 Package: mariadb-plugin-tokudb
 Architecture: any
 Depends: mariadb-server-10.2 (= ${binary:Version}),
+         libjemalloc1 (>= 3.0.0~),
          ${misc:Depends},
          ${shlibs:Depends}
 Breaks: mariadb-server-10.0,

storage/tokudb/CMakeLists.txt

@@ -54,7 +54,7 @@ ELSEIF(LIBJEMALLOC STREQUAL jemalloc)
   GET_FILENAME_COMPONENT(LIBJEMALLOC_PATH ${LIBJEMALLOC_SO} REALPATH CACHE)
 ENDIF()
 
-IF(LIBJEMALLOC_PATH AND RPM MATCHES fedora28) # TODO check for jemalloc version
+IF(LIBJEMALLOC_PATH AND (RPM OR DEB))
   UNSET(LIBJEMALLOC)
   GET_DIRECTORY_PROPERTY(V DIRECTORY ${CMAKE_SOURCE_DIR} DEFINITION CPACK_RPM_tokudb-engine_PACKAGE_REQUIRES)
   SET(CPACK_RPM_tokudb-engine_PACKAGE_REQUIRES "${V} jemalloc" PARENT_SCOPE)

storage/tokudb/tokudb.cnf.in

@@ -5,5 +5,4 @@
 plugin-load-add=ha_tokudb.so
 
 [mysqld_safe]
-# it might be necessary to uncomment the following line if jemalloc >= 5.0.0
 @cnf_malloc_lib@

storage/tokudb/tokudb.conf.in

@@ -1,3 +1,2 @@
 [Service]
-# it might be necessary to uncomment the following line if jemalloc >= 5.0.0
 @systemd_env@