Use tryint() for stats value

In some cases the value is [not set], in this case
the conversion to integer does not work.

Closes-Bug: #1970431
Change-Id: I74df7d8bc9f5cbe0709a6471cf7639caea0b58e8
diff --git a/tools/get-stats.py b/tools/get-stats.py
index dc0bd0f..05f088e 100755
--- a/tools/get-stats.py
+++ b/tools/get-stats.py
@@ -31,7 +31,7 @@
         if not line:
             continue
         stat, val = line.split('=')
-        stats[stat] = int(val)
+        stats[stat] = tryint(val)
 
     return stats