Add possibility to set memory limit for binaries run via libSystem. This

is especially needed for bugpoint. This partly implements PR688


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34349 91177308-0d34-0410-b5e6-96231b3b80d8

tools/bugpoint/BugDriver.h

@@ -50,6 +50,7 @@ class BugDriver {
   bool run_as_child;
   bool run_find_bugs;
   unsigned Timeout;
+  unsigned MemoryLimit;
 
   // FIXME: sort out public/private distinctions...
   friend class ReducePassList;
@@ -57,7 +58,7 @@ class BugDriver {
 
 public:
   BugDriver(const char *toolname, bool as_child, bool find_bugs,
-            unsigned timeout);
+            unsigned timeout, unsigned memlimit);
 
   const std::string &getToolName() const { return ToolName; }