Fabric: Forgotten compiler directive and include

Summary: Trivial. Those nits prevent cause compilation errors in some configurations.

Reviewed By: fkgozali

Differential Revision: D7467794

fbshipit-source-id: cbda285748374fd941a0b1ca6718d702ca2d6d82

ReactCommon/exceptions/ExceptionManager.h

@@ -5,6 +5,8 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+#pragma once
+
 #include <exception>
 
 namespace facebook {

ReactCommon/fabric/graphics/Geometry.h

@@ -2,6 +2,8 @@
 
 #pragma once
 
+#include <tuple>
+
 #include <CoreGraphics/CGBase.h>
 
 namespace facebook {