Fix constructor-related typos.

Noticed by Roman Divacky.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190311 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/AnalysisBasedWarnings.cpp b/lib/Sema/AnalysisBasedWarnings.cpp
index d499742..599c486 100644
--- a/lib/Sema/AnalysisBasedWarnings.cpp
+++ b/lib/Sema/AnalysisBasedWarnings.cpp
@@ -1587,7 +1587,7 @@
   AnalysisDeclContext AC(/* AnalysisDeclContextManager */ 0, D);
 
   // Don't generate EH edges for CallExprs as we'd like to avoid the n^2
-  // explosion for destrutors that can result and the compile time hit.
+  // explosion for destructors that can result and the compile time hit.
   AC.getCFGBuildOptions().PruneTriviallyFalseEdges = true;
   AC.getCFGBuildOptions().AddEHEdges = false;
   AC.getCFGBuildOptions().AddInitializers = true;