Move the files from host/include/i386 to host/include/x86_64,
replacing the stub headers that redirected to i386.
Remove linux-user/include/host/i386.
Remove common-user/host/i386.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>