package/botan: fix build with aarch64_be

aarch64_be support was added by commit 3e3b524883cebf190099c72d41c817baa8192589

Fixes:
 - http://autobuild.buildroot.org/results/69ebf03c59b2af4140a39bc26f17d0396b6ec15d

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/botan/0001-src-build-data-arch-arm64.txt-add-aarch64_be.patch

@@ -0,0 +1,31 @@
+From a93bc8503649028852402c61bdda531af2872d0e Mon Sep 17 00:00:00 2001
+From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+Date: Thu, 15 Oct 2020 09:15:06 +0200
+Subject: [PATCH] src/build-data/arch/arm64.txt: add aarch64_be
+
+Allow the user to set cpu value to aarch64_be.
+Endianness will be correctly guessed by choose_endian function because
+this alias ends with "be"
+
+Fixes:
+ - http://autobuild.buildroot.org/results/69ebf03c59b2af4140a39bc26f17d0396b6ec15d
+
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+[Retrieved from:
+https://github.com/randombit/botan/commit/a93bc8503649028852402c61bdda531af2872d0e]
+---
+ src/build-data/arch/arm64.txt | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/src/build-data/arch/arm64.txt b/src/build-data/arch/arm64.txt
+index 056c5318ff..5205295125 100644
+--- a/src/build-data/arch/arm64.txt
++++ b/src/build-data/arch/arm64.txt
+@@ -5,6 +5,7 @@ family arm
+ 
+ <aliases>
+ aarch64
++aarch64_be
+ armv8
+ armv8-a
+ </aliases>