[RuntimeDyld] Make SectionEntry's Name field a std::string.

StringRef is unsafe here, since SectionEntry instances can outlive the
ObjectFile instances they are created from.

llvm-svn: 234910
diff --git a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
index e866c40..ee51a75 100644
--- a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
+++ b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h
@@ -52,7 +52,7 @@
 class SectionEntry {
 public:
   /// Name - section name.
-  StringRef Name;
+  std::string Name;
 
   /// Address - address in the linker's memory where the section resides.
   uint8_t *Address;