build: use base version in pkgconfig file

Change-Id: Ie63edcffa61caafca3d64e77753e45fee8ce55da
diff --git a/.jenkins.d/30-coverage.sh b/.jenkins.d/30-coverage.sh
index b6d3147..af3a416 100755
--- a/.jenkins.d/30-coverage.sh
+++ b/.jenkins.d/30-coverage.sh
@@ -35,6 +35,7 @@
     --quiet \
     --branch-coverage \
     --demangle-cpp \
+    --flat \
     --legend \
     --missed \
     --show-proportion \