add some comments: MCContext owns the MCSections, but it bump pointer allocates
them, so it doesn't have to explicitly free them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78870 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCContext.cpp b/lib/MC/MCContext.cpp
index e6fb5c8..6333835 100644
--- a/lib/MC/MCContext.cpp
+++ b/lib/MC/MCContext.cpp
@@ -18,6 +18,8 @@
 }
 
 MCContext::~MCContext() {
+  // NOTE: The sections are all allocated out of a bump pointer allocator,
+  // we don't need to free them here.
 }
 
 MCSection *MCContext::GetSection(const StringRef &Name) const {