Make ./smoke-test.sh --targetRid $RID work (#2155)

The argument isn't read before we start using the value of targetRid, so
defer using targetRid until after the argument has been read.

Fixes: #2081

Author: omajid

smoke-test.sh

@@ -10,8 +10,6 @@ DEV_CERTS_VERSION_DEFAULT=5.0.0-preview.3
 __ROOT_REPO=$(sed 's/\r$//' "$SCRIPT_ROOT/artifacts/obj/rootrepo.txt") # remove CR if mounted repo on Windows drive
 executingUserHome=${HOME:-}
 
-echo "RID to test: ${targetRid?not specified. Use ./build.sh --run-smoke-test to detect RID, or specify manually.}"
-
 export DOTNET_CLI_TELEMETRY_OPTOUT=1
 export DOTNET_SKIP_FIRST_TIME_EXPERIENCE=1
 
@@ -586,6 +584,8 @@ function copyRestoredPackages() {
     fi
 }
 
+echo "RID to test: ${targetRid?not specified. Use ./build.sh --run-smoke-test to detect RID, or specify manually.}"
+
 if [ "$__ROOT_REPO" != "known-good" ]; then
     echo "Skipping smoke-tests since cli was not built";
     exit