Bugzilla bug 337770: upgraded the NSS tag from NSS_3_11_20060403_TAG

(NSS 3.11 + fixes) to NSS_3_11_20060512_TAG (NSS 3.11.1 + fixes). r=kengert

client.mk

@@ -374,7 +374,7 @@ MODULES_all :=                                  \
 # and commit this file on that tag.
 #MOZ_CO_TAG          = <tag>
 NSPR_CO_TAG          = NSPRPUB_PRE_4_2_CLIENT_BRANCH
-NSS_CO_TAG           = NSS_3_11_20060403_TAG
+NSS_CO_TAG           = NSS_3_11_20060512_TAG
 LDAPCSDK_CO_TAG      = ldapcsdk_5_17_client_branch
 LOCALES_CO_TAG       =