Add Emacs hints to Alarm.inc.

Also removes some trailing whitespace and fixes one 80-column violation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64094 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/System/Unix/Alarm.inc b/lib/System/Unix/Alarm.inc
index 853fcf5..7faa6af 100644
--- a/lib/System/Unix/Alarm.inc
+++ b/lib/System/Unix/Alarm.inc
@@ -1,4 +1,4 @@
-//===-- Alarm.inc - Implement Unix Alarm Support --------------------------===//
+//===-- Alarm.inc - Implement Unix Alarm Support ----------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -20,11 +20,11 @@
 /// user presses CTRL-C.
 static volatile bool AlarmCancelled = false;
 
-/// AlarmTriggered - This flag is set by the SIGALRM signal handler if the 
+/// AlarmTriggered - This flag is set by the SIGALRM signal handler if the
 /// alarm was triggered.
 static volatile bool AlarmTriggered = false;
 
-/// NestedSOI - Sanity check.  Alarms cannot be nested or run in parallel.  
+/// NestedSOI - Sanity check.  Alarms cannot be nested or run in parallel.
 /// This ensures that they never do.
 static bool NestedSOI = false;