system/nss: fix baseline ppc* support

system/nss/APKBUILD

@@ -3,7 +3,7 @@
 pkgname=nss
 pkgver=3.51
 _ver=$(printf '%s' "$pkgver" | tr . _)
-pkgrel=0
+pkgrel=1
 pkgdesc="Mozilla Network Security Services"
 url="https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS"
 arch="all"
@@ -49,6 +49,17 @@ build() {
 	case "$CARCH" in
 		*64* | s390x) export USE_64=1;;
 	esac
+
+	# This actually enables -mvsx and -mcrypto too, and those can't
+	# be turned off separately in this case:
+	#
+	# altivec-types.h:20:1: error: use of _long long_ in AltiVec
+	# types is invalid without _-mvsx_
+	#
+	# typedef __vector signed long long vec_s64;
+	# ^~~~~~~
+	export NSS_DISABLE_ALTIVEC=1
+
 	make -j 1 -C nss/coreconf
 	make -j 1 -C nss/lib/dbm
 	make -j 1 -C nss