automated: linux: systemd-analyze: update description

Update the yaml description.

Reported-by: Benjamin Copeland <benjamin.copeland@linaro.org>
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>

Author: roxell

automated/linux/systemd-analyze/systemd-analyze.yaml

@@ -4,8 +4,11 @@ metadata:
     format: Lava-Test Test Definition 1.0
     name: systemd-analyze
     description: |
-        The systemd-analyze analyzes the boot times. It's boot times
-        for firmware, bootloader, kernel and userspace.
+        systemd-analyze may be used to determine system boot-up performance
+        statistics and retrieve other state and tracing information from the
+        system and service manager, and to verify the correctness of unit
+        files. It is also used to access special functions useful for advanced
+        system manager debugging.
     maintainer:
         - anders.roxell@linaro.org
     os: