virt.tests: sync libhugetlbfs testing to autotest_control suite

Signed-off-by: Xu Tian <xutian@redhat.com>
virt.shared: add glibc-devel and glibc-static into RHEL.6 ks

glibc-devel and glibc-static is requried by build libhugetlbfs source;

Signed-off-by: Xu Tian <xutian@redhat.com>
Merge pull request #773 from xutian/fix_libhugetlbfs

sync libhugetlbfs testing in client tests to virt tests