Fixed spelling & grammar.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8559 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/Signals.cpp b/lib/Support/Signals.cpp
index effc059..563147e 100644
--- a/lib/Support/Signals.cpp
+++ b/lib/Support/Signals.cpp
@@ -1,7 +1,7 @@
 //===- Signals.cpp - Signal Handling support ------------------------------===//
 //
 // This file defines some helpful functions for dealing with the possibility of
-// unix signals occuring while your program is running.
+// Unix signals occuring while your program is running.
 //
 //===----------------------------------------------------------------------===//