build-appliance-image: Update to scarthgap head revision

(From OE-Core rev: a051a066da2874b95680d0353dfa18c1d56b2670)

Signed-off-by: Steve Sakoman <steve@sakoman.com>

meta/recipes-core/images/build-appliance-image_15.0.0.bb

@@ -26,7 +26,7 @@ inherit core-image setuptools3 features_check
 
 REQUIRED_DISTRO_FEATURES += "xattr"
 
-SRCREV ?= "bf88a67b45235236d6655dce604e632eb94a813c"
+SRCREV ?= "98d2128bd5c41285b8982d4bbc3a2db28f2209ce"
 SRC_URI = "git://git.yoctoproject.org/poky;branch=scarthgap \
            file://Yocto_Build_Appliance.vmx \
            file://Yocto_Build_Appliance.vmxf \