qcom-base: enable pixman and VNC features for qemu (#241)

Graphical debugging and remote access use cases require pixman-based
rendering and authenticated VNC support. Add pixman, vnc-jpeg, and
vnc-sasl to qemu PACKAGECONFIG.

Fixes qualcomm-linux/meta-qcom#1600

Author: ricardosalveti

conf/distro/include/qcom-base.inc

@@ -62,4 +62,4 @@ BUILDHISTORY_COMMIT = "1"
 # Disable weston idle timeout
 PACKAGECONFIG:append:pn-weston-init = " no-idle-timeout"
 
-PACKAGECONFIG:append:pn-qemu = " virtfs"
+PACKAGECONFIG:append:pn-qemu = " pixman virtfs vnc-jpeg vnc-sasl"