Fixes endian issue in GFX on sparc and fixes atomic operations. 

Will not send upstream, sparc specific. 

diff --git a/js/src/jit/AtomicOperations.h b/js/src/jit/AtomicOperations.h

--- a/js/src/jit/AtomicOperations.h

+++ b/js/src/jit/AtomicOperations.h

@@ -297,17 +297,17 @@ AtomicOperations::isLockfree(int32_t siz

 #if defined(JS_CODEGEN_ARM)

 # include "jit/arm/AtomicOperations-arm.h"

 #elif defined(JS_CODEGEN_ARM64)

 # include "jit/arm64/AtomicOperations-arm64.h"

 #elif defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64)

 # include "jit/mips-shared/AtomicOperations-mips-shared.h"

 #elif defined(__ppc64__) || defined(__PPC64_)       \

     || defined(__ppc64le__) || defined(__PPC64LE__) \

-    || defined(__ppc__) || defined(__PPC__)

+    || defined(__ppc__) || defined(__PPC__) || defined(__sparc)

 # include "jit/none/AtomicOperations-ppc.h"

 #elif defined(JS_CODEGEN_NONE)

 # include "jit/none/AtomicOperations-none.h"

 #elif defined(JS_CODEGEN_X86) || defined(JS_CODEGEN_X64)

 # include "jit/x86-shared/AtomicOperations-x86-shared.h"

 #else

 # error "Atomic operations must be defined for this platform"

 #endif

--- a/gfx/2d/Types.h    Tue May  3 14:20:54 2016

+++ b/gfx/2d/Types.h    Tue May  3 13:43:00 2016

@@ -61,15 +61,8 @@

   // The following values are endian-independent synonyms. The _UINT32 suffix

   // indicates that the name reflects the layout when viewed as a uint32_t

   // value.

-#if MOZ_LITTLE_ENDIAN

   A8R8G8B8_UINT32 = B8G8R8A8,       // 0xAARRGGBB

   X8R8G8B8_UINT32 = B8G8R8X8        // 0x00RRGGBB

-#elif MOZ_BIG_ENDIAN

-  A8R8G8B8_UINT32 = A8R8G8B8,       // 0xAARRGGBB

-  X8R8G8B8_UINT32 = X8R8G8B8        // 0x00RRGGBB

-#else

-# error "bad endianness"

-#endif

 };

 inline bool IsOpaque(SurfaceFormat aFormat)