libhugetlbfs: install perl lib to directory perl instead of perl5

   *libhugetlbfs depends on perl, and perl installs a directory 'perl'
    and make a symlink 'perl5' to it. So just install perl libs in
    libhugetlbfs to directory 'perl' instead of 'perl5'. This can avoid
    the following error:
    | CalledProcessError: Command 'tar -cf - -C .../perl/5.14.3-r1/sysroot-destdir
    | -ps . | tar -xf - -C .../tmp/sysroots/t4240qds'
    | returned non-zero exit status 2 with output
    | tar: ./usr/lib/perl5: Cannot create symlink to `perl': File exists
    | tar: Exiting with failure status due to previous errors

Signed-off-by: Chunrong Guo <B40290@freescale.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>