openmx: Fix for aarch64 (#21367)

var/spack/repos/builtin/packages/openmx/for_aarch64.patch

@@ -0,0 +1,11 @@
+--- spack-src/source/Krylov.c.bak	2016-03-27 15:53:28.000000000 +0900
++++ spack-src/source/Krylov.c	2021-01-28 15:31:32.660274698 +0900
+@@ -29,7 +29,7 @@
+ #ifdef nosse
+ #include "mimic_sse.h"
+ #else
+-#include <emmintrin.h>
++#include <sse2neon.h>
+ #endif
+ 
+ #ifdef kcomp

var/spack/repos/builtin/packages/openmx/package.py

@@ -25,6 +25,9 @@ class Openmx(MakefilePackage):
     depends_on('fftw')
     depends_on('blas')
     depends_on('lapack')
+    depends_on('sse2neon', when='target=aarch64:')
+
+    patch('for_aarch64.patch', when='@3.8 target=aarch64:')
 
     parallel = False