Replace SIZE_T_MAX with std::numeric_limits value in Section.cpp.

SIZE_T_MAX is not available on Linux.

llvm-svn: 208789
diff --git a/lldb/source/Core/Section.cpp b/lldb/source/Core/Section.cpp
index 115c662..deaebb4 100644
--- a/lldb/source/Core/Section.cpp
+++ b/lldb/source/Core/Section.cpp
@@ -13,6 +13,8 @@
 #include "lldb/Target/SectionLoadList.h"
 #include "lldb/Target/Target.h"
 
+#include <limits>
+
 using namespace lldb;
 using namespace lldb_private;
 
@@ -337,7 +339,8 @@
         m_sections.push_back(section_sp);
         return section_index;
     }
-    return SIZE_T_MAX;
+
+    return std::numeric_limits<size_t>::max ();
 }
 
 // Warning, this can be slow as it's removing items from a std::vector.