[PATCH] Fix cross compiling sparc64 on arm32 host

[Cole Robinson]

Add arm32 to the whitelist for handling lack of int128 type variants.
Otherwise we get errors like:

/target/include/asm/types.h:79:1: error: unknown type name ‘__int128_t’
    typedef __int128_t dcell;

This may introduce issues building on aarch64 but I have no way to test.
---

Recently, Fedora's build system had many arm hosts added. Since we always
cross build openbios, the RPM build is scheduled independent of the
build machine architecture. So whenever an openbios build was scheduled
to an arm host, things fell over.

config/scripts/switch-arch | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/config/scripts/switch-arch b/config/scripts/switch-arch
index 44f2df4..86cab3c 100755
--- a/config/scripts/switch-arch
+++ b/config/scripts/switch-arch
@@ -77,7 +77,7 @@ crosscflags()
     if test "$target" = "sparc64" -o "$target" = "ia64" \
          -o "$target" = "amd64" -o "$target" = "x86_64" \
          -o "$target" = "alpha"; then
-        if test "$host" = "x86"; then
+        if test "$host" = "x86" -o "$host" = "arm"; then
             cflags="$cflags -DNEED_FAKE_INT128_T"
         elif test "$host" = "ppc" -a `uname -s` = "Darwin"; then
             cflags="$cflags -DNEED_FAKE_INT128_T"