network/rtl8812bu: Fix 32bit build.

Signed-off-by: Andrew Clemons <andrew.clemons@gmail.com>

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

network/rtl8812bu/rtl8812bu.SlackBuild

@@ -52,7 +52,13 @@ find -L .  -perm /111 -a \! -perm 755 -a -exec chmod 755 {} \+ -o \
         \! -perm /111 -a \! -perm 644 -a -exec chmod 644 {} \+
 
 export KVER=$KERNEL
-env -u ARCH make
+if [ "$ARCH" = "i586" ] || [ "$ARCH" = "i686" ] ; then
+  # auto detect in the Makefile does not work and sets ARCH to `uname -m`, but
+  # it only builds if it is set to i386
+  ARCH=i386 make
+else
+  env -u ARCH make
+fi
 install -D -m0644 88x2bu.ko \
   $PKG/lib/modules/$KERNEL/kernel/drivers/net/wireless/88x2bu.ko