libnss: bump to version 3.27.2

Fixes a memory leak in SSL_SetTrustAnchors():
https://bugzilla.mozilla.org/show_bug.cgi?id=1318561

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libnss/libnss.hash

@@ -1,2 +1,2 @@
-# From https://ftp.mozilla.org/pub/mozilla.org/security/nss/releases/NSS_3_27_1_RTM/src/SHA256SUMS
-sha256	fd3637a1930cd838239a89633a7ed9a18859ae9b599043f3a18f726dc4ec2a6b	nss-3.27.1.tar.gz
+# From https://ftp.mozilla.org/pub/mozilla.org/security/nss/releases/NSS_3_27_2_RTM/src/SHA256SUMS
+sha256	dc8ac8524469d0230274fd13a53fdcd74efe4aa67205dde1a4a92be87dc28524	nss-3.27.2.tar.gz

package/libnss/libnss.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-LIBNSS_VERSION = 3.27.1
+LIBNSS_VERSION = 3.27.2
 LIBNSS_SOURCE = nss-$(LIBNSS_VERSION).tar.gz
 LIBNSS_SITE = https://ftp.mozilla.org/pub/mozilla.org/security/nss/releases/NSS_$(subst .,_,$(LIBNSS_VERSION))_RTM/src
 LIBNSS_DISTDIR = dist