Fix double full-stop that was accidentally added in r217160.

llvm-svn: 217161
diff --git a/clang/lib/CodeGen/TargetInfo.cpp b/clang/lib/CodeGen/TargetInfo.cpp
index 4dbbc55..0da0e08 100644
--- a/clang/lib/CodeGen/TargetInfo.cpp
+++ b/clang/lib/CodeGen/TargetInfo.cpp
@@ -5562,7 +5562,7 @@
         return ABIArgInfo::getDirect();
 
       // O32 returns integer vectors in registers and N32/N64 returns all small
-      // aggregates in registers..
+      // aggregates in registers.
       if (!IsO32 ||
           (RetTy->isVectorType() && !RetTy->hasFloatingRepresentation())) {
         ABIArgInfo ArgInfo =