Update Tizen CI RID (#30692)

* Update Tizen RID for CI

* Update Tizen url for rootfs generation

Author: gbalykov

cross/arm32_ci_script.sh

@@ -211,7 +211,7 @@ function cross_build_corefx_with_docker {
             __dockerImage=" tizendotnet/dotnet-buildtools-prereqs:ubuntu-16.04-cross-e435274-20180426002255-tizen-rootfs-5.0m1"
             __skipRootFS=1
             __dockerEnvironmentVariables+=" -e ROOTFS_DIR=/crossrootfs/armel.tizen.build"
-            __runtimeOS="tizen.4.0.0"
+            __runtimeOS="tizen.5.0.0"
         ;;
         *)
             echo "ERROR: $__linuxCodeName is not a supported linux name for $__buildArch"

cross/armel/tizen-fetch.sh

@@ -51,7 +51,7 @@ if [ ! -d $TMPDIR ]; then
 	mkdir -p $TMPDIR 
 fi
 
-TIZEN_URL=http://download.tizen.org/snapshots/tizen
+TIZEN_URL=http://download.tizen.org/releases/milestone/tizen
 BUILD_XML=build.xml
 REPOMD_XML=repomd.xml
 PRIMARY_XML=primary.xml