Factored common functionality out of the Courgette stress test scripts

courgette/run_stress_test

Index: courgette/run_stress_test
diff --git a/courgette/run_stress_test b/courgette/run_stress_test
index 442ad3d1f9ee8706439514b6c3489c3f1758543c..dd1a78d88d22f61c9284a43ea648feb4c6fa5c4f 100755
--- a/courgette/run_stress_test
+++ b/courgette/run_stress_test
@@ -6,9 +6,7 @@
 
 # Stress test and size measurement for courgette patches.
 
-error() {
-  echo "error: ${@}" >&2
-}
+source "$(dirname ${0})/stress_test_common"
 
 outdir_prefix="stress_test_"
 time="/usr/bin/time"
@@ -163,14 +161,6 @@ done 2>&1 | tee -a "${log}"
 
 date >> "${log}"
 
-count_result() {
-  if [ ! -z "${1}" ]; then
-    echo $(cat "${log}" | grep "^${1} " | wc -l)    
-  else
-    echo 0
-  fi
-}
-
 cat <<EOF | tee -a "${log}"
 $(count_result "PASS_COURGETTE") successful courgette patches
 $(count_result "FAIL_COURGETTE") failed courgette patches (search log for \