byteswap: Don't use intrinsic byteswap functions with Intel C compiler

It reroutes intrinsic _byteswap_u(short|long|int64) call to libc function.

include/SDL_endian.h

@@ -140,7 +140,7 @@ extern "C" {
 
 #if HAS_BUILTIN_BSWAP16
 #define SDL_Swap16(x) __builtin_bswap16(x)
-#elif defined(_MSC_VER) && (_MSC_VER >= 1400)
+#elif (defined(_MSC_VER) && (_MSC_VER >= 1400)) && !defined(__ICL)
 #pragma intrinsic(_byteswap_ushort)
 #define SDL_Swap16(x) _byteswap_ushort(x)
 #elif defined(__i386__) && !HAS_BROKEN_BSWAP
@@ -189,7 +189,7 @@ SDL_Swap16(Uint16 x)
 
 #if HAS_BUILTIN_BSWAP32
 #define SDL_Swap32(x) __builtin_bswap32(x)
-#elif defined(_MSC_VER) && (_MSC_VER >= 1400)
+#elif (defined(_MSC_VER) && (_MSC_VER >= 1400)) && !defined(__ICL)
 #pragma intrinsic(_byteswap_ulong)
 #define SDL_Swap32(x) _byteswap_ulong(x)
 #elif defined(__i386__) && !HAS_BROKEN_BSWAP
@@ -241,7 +241,7 @@ SDL_Swap32(Uint32 x)
 
 #if HAS_BUILTIN_BSWAP64
 #define SDL_Swap64(x) __builtin_bswap64(x)
-#elif defined(_MSC_VER) && (_MSC_VER >= 1400)
+#elif (defined(_MSC_VER) && (_MSC_VER >= 1400)) && !defined(__ICL)
 #pragma intrinsic(_byteswap_uint64)
 #define SDL_Swap64(x) _byteswap_uint64(x)
 #elif defined(__i386__) && !HAS_BROKEN_BSWAP