glibc: Update to version 2.22

glibc: Update to version 2.22

Security fix:
  A buffer overflow in gethostbyname_r and related functions performing DNS
  requests has been fixed.  If the NSS functions were called with a
  misaligned buffer, the buffer length change due to pointer alignment was
  not taken into account.  This could result in application crashes or,
  potentially arbitrary code execution, using crafted, but syntactically
  valid DNS responses.  (CVE-2015-1781)

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>