package/libnss: fix build failure on arm32 arch not armv7

NSS assumes that every neon arm32 build is an armv7, but this is
not always true(i.e. build arm32 for armv8), so let's add a patch to
remove -march=armv7 flag when building gcm-arm32-neon.c

Fixes:
http://autobuild.buildroot.net/results/464/464044fda2850123339de6c8071374e380636ee0/

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Reviewed-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/libnss/0002-Bug-1624864-Don-t-force-ARMv7-for-gcm-arm32-neon-r-j.patch

@@ -0,0 +1,30 @@
+From ab8d2425728f37b1f21dbff712daf4a767c82149 Mon Sep 17 00:00:00 2001
+From: Giulio Benetti <giulio.benetti@benettiengineering.com>
+Date: Wed, 1 Apr 2020 09:41:08 -0700
+Subject: [PATCH] Bug 1624864 - Don't force ARMv7 for gcm-arm32-neon r=jcj
+
+--HG--
+extra : rebase_source : e046bbe45276b8cdf686c4f61006aff08865f1c0
+
+[Upstream: https://hg.mozilla.org/projects/nss/rev/8582092359720d052288cad2dc13f37aad783dc3]
+Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
+---
+ nss/lib/freebl/Makefile | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/nss/lib/freebl/Makefile b/nss/lib/freebl/Makefile
+index a03c0d108..898a0b9e0 100644
+--- a/nss/lib/freebl/Makefile
++++ b/nss/lib/freebl/Makefile
+@@ -781,7 +781,7 @@ ifeq ($(CPU_ARCH),arm)
+ USES_SOFTFLOAT_ABI := $(shell $(CC) -o - -E -dM - $(CFLAGS) < /dev/null | grep __SOFTFP__ > /dev/null && echo 1)
+ $(OBJDIR)/$(PROG_PREFIX)aes-armv8$(OBJ_SUFFIX): CFLAGS += -march=armv8-a -mfpu=crypto-neon-fp-armv8$(if $(USES_SOFTFLOAT_ABI), -mfloat-abi=softfp)
+ ifndef NSS_DISABLE_ARM32_NEON
+-$(OBJDIR)/$(PROG_PREFIX)gcm-arm32-neon$(OBJ_SUFFIX): CFLAGS += -march=armv7 -mfpu=neon$(if $(USES_SOFTFLOAT_ABI), -mfloat-abi=softfp)
++$(OBJDIR)/$(PROG_PREFIX)gcm-arm32-neon$(OBJ_SUFFIX): CFLAGS += -mfpu=neon$(if $(USES_SOFTFLOAT_ABI), -mfloat-abi=softfp)
+ endif
+ endif
+ ifeq ($(CPU_ARCH),aarch64)
+-- 
+2.20.1
+