core-image-sato: Fix runqemu error for qemuarmv5

When attempting to execute runqemu on qemuarmv5, the following error is
encountered:

runqemu - ERROR - Failed to run qemu: qemu-system-arm: versatilepb: memory size must not exceed 256MB

To work around this, limit the QB_MEM size for qemuarmv5, similar to
what is being done for qemumips.

(From OE-Core rev: 6450138afebffcc55ab32afadd5fb979274fff2b)

Signed-off-by: Jon Mason <jdmason@kudzu.us>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-sato/images/core-image-sato.bb

@@ -13,4 +13,5 @@ TOOLCHAIN_HOST_TASK:append = " nativesdk-intltool nativesdk-glib-2.0"
 TOOLCHAIN_HOST_TASK:remove:task-populate-sdk-ext = " nativesdk-intltool nativesdk-glib-2.0"
 
 QB_MEM = '${@bb.utils.contains("DISTRO_FEATURES", "opengl", "-m 512", "-m 256", d)}'
+QB_MEM:qemuarmv5 = "-m 256"
 QB_MEM:qemumips = "-m 256"