performance-metrics: Add a binary target for performance metrics

This commit creates a new binary target for generating performance metrics,
and also adds a set of performance tests for network throughput/latency,
block I/O performance, and boot time.

Signed-off-by: Bo Chen <chen.bo@intel.com>

performance-metrics/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "performance-metrics"
+version = "0.1.0"
+authors = ["The Cloud Hypervisor Authors"]
+edition = "2018"
+
+[dependencies]
+dirs = "4.0.0"
+lazy_static= "1.4.0"
+serde_json = "1.0.78"
+test_infra = { path = "../test_infra" }
+vmm-sys-util = "0.9.0"
+wait-timeout = "0.2.0"