Integrate embench-iot as benchmark suite

.github/workflows/build-artifact.yml

@@ -29,6 +29,7 @@ jobs:
             mk/kconfig.mk
             mk/toolchain.mk
             tools/detect-env.py
+            tests/embench-iot/**
             tests/ansibench/**
             tests/rv8-bench/**
             tests/doom/**
@@ -59,7 +60,7 @@ jobs:
         run: |
           sudo apt-get update -q=2
           sudo apt-get upgrade -q=2
-          sudo apt-get install -q=2 gcc-multilib g++-multilib
+          sudo apt-get install -q=2 gcc-multilib g++-multilib scons
           .ci/riscv-toolchain-install.sh
           echo "$PWD/toolchain/bin" >> $GITHUB_PATH
       - name: Build binaries

.gitmodules

@@ -34,3 +34,7 @@
 	path = src/dtc
 	url = https://github.com/dgibson/dtc
 	shallow = true
+[submodule "tests/embench-iot"]
+	path = tests/embench-iot
+	url = https://github.com/yc199911/embench-iot.git
+	shallow = true

mk/artifact.mk

@@ -13,6 +13,7 @@ BIN_DIR := $(abspath $(OUT))
 
 TEST_SUITES += \
 	ansibench \
+	embench-iot \
 	rv8-bench
 
 # "ieee754" needs F extension