[llvm-locstats] Fix 'only params' no entry value stats

Adding the missing line.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@374875 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/llvm-locstats/llvm-locstats.py b/utils/llvm-locstats/llvm-locstats.py
index 22e5ae6..4df525e 100755
--- a/utils/llvm-locstats/llvm-locstats.py
+++ b/utils/llvm-locstats/llvm-locstats.py
@@ -167,6 +167,7 @@
         cov_category = \
           "params (excluding the debug entry values) " \
           "with {} of its scope covered".format(cov_bucket)
+        variables_coverage_map[cov_bucket] = json_parsed[cov_category]
   else:
     # Read the JSON for both local variables and formal parameters.
     variables_total = \