poky: Update version to 1.5.4

(From meta-yocto rev: 814bf2d26e6f7a13d8eeaf88cbb0c23024e7c4ab)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta-yocto/conf/distro/poky.conf

@@ -1,6 +1,6 @@
 DISTRO = "poky"
 DISTRO_NAME = "Poky (Yocto Project Reference Distro)"
-DISTRO_VERSION = "1.5.3"
+DISTRO_VERSION = "1.5.4"
 DISTRO_CODENAME = "dora"
 SDK_VENDOR = "-pokysdk"
 SDK_VERSION := "${@'${DISTRO_VERSION}'.replace('snapshot-${DATE}','snapshot')}"