libnss: security bump to version 3.30.2

libnss: security bump to version 3.30.2

CVE-2017-5461 - Out-of-bounds write in Base64 encoding in NSS. Might cause
remote arbitrary code execution
(https://access.redhat.com/errata/RHSA-2017:1100).

CVE-2017-5462 - DRBG flaw in NSS

Drop 0001-cross-compile.patch and TARGET* variables. Upstream Makefile now
allows override of CC, so use TARGET_CONFIGURE_OPTS instead.

Drop upstream 0003-it-uninitialized-fix.patch.

Renumber the remaining patch.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>