hs-test: fix LDPreloadIperfVppTest

- fixed ldpreload path (debug build)

Type: test

Change-Id: Ib2ab58b32ffd87a78189464b599f7bbc4f05c175
Signed-off-by: Adrian Villin <avillin@cisco.com>
diff --git a/extras/hs-test/hs_test.sh b/extras/hs-test/hs_test.sh
index 28df3e5..4914e60 100644
--- a/extras/hs-test/hs_test.sh
+++ b/extras/hs-test/hs_test.sh
@@ -7,6 +7,7 @@
 persist_set=0
 unconfigure_set=0
 debug_set=0
+debug_build=
 ginkgo_args=
 
 for i in "$@"
@@ -26,6 +27,12 @@
             debug_set=1
         fi
         ;;
+    --debug_build=*)
+        debug_build="${i#*=}"
+        if [ "$debug_build" = "true" ]; then
+            args="$args -debug_build"
+        fi
+        ;;
     --verbose=*)
         verbose="${i#*=}"
         if [ "$verbose" = "true" ]; then
@@ -80,7 +87,7 @@
 fi
 
 if [ $single_test -eq 0 ] && [ $debug_set -eq 1 ]; then
-    echo "VPP debug flag is not supperted while running all tests!"
+    echo "VPP debug flag is not supported while running all tests!"
     exit 1
 fi