[sanitizer] Clobber llvm_build0 dir

git-svn-id: https://llvm.org/svn/llvm-project/zorg/trunk@370159 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/zorg/buildbot/builders/sanitizers/buildbot_functions.sh b/zorg/buildbot/builders/sanitizers/buildbot_functions.sh
index 6a89eef..44e5218 100755
--- a/zorg/buildbot/builders/sanitizers/buildbot_functions.sh
+++ b/zorg/buildbot/builders/sanitizers/buildbot_functions.sh
@@ -13,7 +13,7 @@
 function clobber {
   if [ "$BUILDBOT_CLOBBER" != "" ]; then
     echo @@@BUILD_STEP clobber@@@
-    rm -rf llvm llvm-project ${CLOBBER:-}
+    rm -rf llvm llvm-project llvm_build0 ${CLOBBER:-}
     stage1_clobber
     ! test "$(ls -A .)" || echo @@@STEP_EXCEPTION@@@
   fi