Fix compilation on Mac M1 without -DHAVE_ARM

Author: milot-mirdita

src/CMakeLists.txt

@@ -66,7 +66,7 @@ if (NATIVE_ARCH AND (ARCH_FLAGS STREQUAL ""))
             set(ARCH_FLAGS "-march=native")
         endif()
     else ()
-        if (PPC64)
+        if (PPC64 OR ARM)
             set(ARCH_FLAGS "-mcpu=native")
         else ()
             set(ARCH_FLAGS "-march=native")