Add experimental chroot check which checks improper use of chroot(). Patch by 
Lei Zhang.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@116163 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Checker/GRExprEngineExperimentalChecks.cpp b/lib/Checker/GRExprEngineExperimentalChecks.cpp
index 84262b0..6f70286 100644
--- a/lib/Checker/GRExprEngineExperimentalChecks.cpp
+++ b/lib/Checker/GRExprEngineExperimentalChecks.cpp
@@ -22,6 +22,7 @@
   // These are checks that never belong as internal checks
   // within GRExprEngine.
   RegisterCStringChecker(Eng);
+  RegisterChrootChecker(Eng);
   RegisterMallocChecker(Eng);
   RegisterPthreadLockChecker(Eng);
   RegisterStreamChecker(Eng);