Bug 1298882 - ensure mozilla/mscom/Utils.h is included with uniform casing; r=aklotz

We install mozilla/mscom/Utils.h, but include it with an all-lowercased
path in some places.  clang-cl warns about this, and even though this is
Windows-only code and will therefore work, it's better to make
everything consistent.

ipc/mscom/EnsureMTA.h

@@ -12,7 +12,7 @@
 #include "mozilla/DebugOnly.h"
 #include "mozilla/Function.h"
 #include "mozilla/mscom/COMApartmentRegion.h"
-#include "mozilla/mscom/utils.h"
+#include "mozilla/mscom/Utils.h"
 #include "nsCOMPtr.h"
 #include "nsIThread.h"
 #include "nsThreadUtils.h"

ipc/mscom/Interceptor.cpp

@@ -11,7 +11,7 @@
 #include "mozilla/mscom/DispatchForwarder.h"
 #include "mozilla/mscom/MainThreadInvoker.h"
 #include "mozilla/mscom/Registration.h"
-#include "mozilla/mscom/utils.h"
+#include "mozilla/mscom/Utils.h"
 #include "MainThreadUtils.h"
 #include "mozilla/Assertions.h"
 #include "mozilla/DebugOnly.h"

ipc/mscom/MainThreadHandoff.cpp

@@ -8,7 +8,7 @@
 
 #include "mozilla/mscom/InterceptorLog.h"
 #include "mozilla/mscom/Registration.h"
-#include "mozilla/mscom/utils.h"
+#include "mozilla/mscom/Utils.h"
 #include "mozilla/Assertions.h"
 #include "mozilla/DebugOnly.h"
 #include "nsThreadUtils.h"

ipc/mscom/ProxyStream.cpp

@@ -7,7 +7,7 @@
 #include "DynamicallyLinkedFunctionPtr.h"
 #include "mozilla/mscom/EnsureMTA.h"
 #include "mozilla/mscom/ProxyStream.h"
-#include "mozilla/mscom/utils.h"
+#include "mozilla/mscom/Utils.h"
 
 #include "mozilla/Move.h"