change path to shell_utils.sh

Bug: 298692416
Test: source build/envsetup.sh && overrideflags, and then check the
output

Change-Id: Idf254b66da17079db2d08e98a9914e1c2f9f6097
diff --git a/tools/overrideflags.sh b/tools/overrideflags.sh
index ff311dd..b8605dc 100755
--- a/tools/overrideflags.sh
+++ b/tools/overrideflags.sh
@@ -14,7 +14,7 @@
 # limitations under the License.
 
 
-source $(cd $(dirname $BASH_SOURCE) &> /dev/null && pwd)/../../make/shell_utils.sh
+source $(cd $(dirname $BASH_SOURCE) &> /dev/null && pwd)/../shell_utils.sh
 require_top
 
 function print_help() {