yocto-bsp: fix qemuarch test for xserver-xf86-config.bbappend

While testing the fix for [YOCTO #2222] I noticed that the qemuarch
test was wrong - there is no 'x86' qemuarch, just 'i386'.  Change the
test to match.

Signed-off-by: Tom Zanussi <tom.zanussi@intel.com>

diff --git a/scripts/lib/bsp/substrate/target/arch/qemu/recipes-graphics/xorg-xserver/{{ if qemuarch == "x86" or qemuarch == "x86_64": }} xserver-xf86-config_0.1.bbappend b/scripts/lib/bsp/substrate/target/arch/qemu/recipes-graphics/xorg-xserver/{{ if qemuarch == "i386" or qemuarch == "x86_64": }} xserver-xf86-config_0.1.bbappend
similarity index 100%
rename from scripts/lib/bsp/substrate/target/arch/qemu/recipes-graphics/xorg-xserver/{{ if qemuarch == "x86" or qemuarch == "x86_64": }} xserver-xf86-config_0.1.bbappend
rename to scripts/lib/bsp/substrate/target/arch/qemu/recipes-graphics/xorg-xserver/{{ if qemuarch == "i386" or qemuarch == "x86_64": }} xserver-xf86-config_0.1.bbappend