build-appliance-image: Update to kirkstone head revision

(From OE-Core rev: 5d97b0576e98a2cf402abab1a1edcab223545d87)

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

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

@@ -24,7 +24,7 @@ IMAGE_FSTYPES = "wic.vmdk wic.vhd wic.vhdx"
 
 inherit core-image setuptools3
 
-SRCREV ?= "4cf40d460852e5e8b4a48dc044fd1c9e650061b3"
+SRCREV ?= "75ff26ce9921dd4cb579274bb30f97bad502ba34"
 SRC_URI = "git://git.yoctoproject.org/poky;branch=kirkstone \
            file://Yocto_Build_Appliance.vmx \
            file://Yocto_Build_Appliance.vmxf \