Fix (1 << 31) to (1u << 31) in SkOTTable_OS_2.

src/sfnt/SkOTTableTypes.h

Index: src/sfnt/SkOTTableTypes.h
===================================================================
--- src/sfnt/SkOTTableTypes.h	(revision 13776)
+++ src/sfnt/SkOTTableTypes.h	(working copy)
@@ -8,6 +8,7 @@
 #ifndef SkOTTableTypes_DEFINED
 #define SkOTTableTypes_DEFINED
 
+#include "SkTemplates.h"
 #include "SkTypes.h"
 #include "SkEndian.h"
 
@@ -45,4 +46,16 @@
     );
 };
 
+/** SkOTSetUSHORTBit<N>::value is an SK_OT_USHORT with the Nth BE bit set. */
+template <unsigned N> struct SkOTSetUSHORTBit {
+    static const uint16_t bit = SkTSetBit<N, uint16_t>::value;
+    static const SK_OT_USHORT value = SkTEndian_SwapBE16(bit);
+};
+
+/** SkOTSetUSHORTBit<N>::value is an SK_OT_ULONG with the Nth BE bit set. */
+template <unsigned N> struct SkOTSetULONGBit {
+    static const uint32_t bit = SkTSetBit<N, uint32_t>::value;
+    static const SK_OT_ULONG value = SkTEndian_SwapBE32(bit);
+};
+
 #endif