fix broken OpenCL 1.2 support

OpenCl 1.2.is not allowing the subscript operator on buildin vector types.

fix: use `.sX` to access vector components

xmrstak/backend/amd/amd_gpu/opencl/wolf-aes.cl

@@ -77,13 +77,13 @@ static const __constant uint AES0_C[256] =
 inline uint4 AES_Round_bittube2(const __local uint *AES0, const __local uint *AES1, const __local uint *AES2, const __local uint *AES3, uint4 x, uint4 k)
 {
 	x = ~x;
-	k[0] ^= AES0[BYTE(x[0], 0)] ^ AES1[BYTE(x[1], 1)] ^ AES2[BYTE(x[2], 2)] ^ AES3[BYTE(x[3], 3)];
-	x[0] ^= k[0];
-	k[1] ^= AES0[BYTE(x[1], 0)] ^ AES1[BYTE(x[2], 1)] ^ AES2[BYTE(x[3], 2)] ^ AES3[BYTE(x[0], 3)];
-	x[1] ^= k[1];
-	k[2] ^= AES0[BYTE(x[2], 0)] ^ AES1[BYTE(x[3], 1)] ^ AES2[BYTE(x[0], 2)] ^ AES3[BYTE(x[1], 3)];
-	x[2] ^= k[2];
-	k[3] ^= AES0[BYTE(x[3], 0)] ^ AES1[BYTE(x[0], 1)] ^ AES2[BYTE(x[1], 2)] ^ AES3[BYTE(x[2], 3)];
+	k.s0 ^= AES0[BYTE(x.s0, 0)] ^ AES1[BYTE(x.s1, 1)] ^ AES2[BYTE(x.s2, 2)] ^ AES3[BYTE(x.s3, 3)];
+	x.s0 ^= k.s0;
+	k.s1 ^= AES0[BYTE(x.s1, 0)] ^ AES1[BYTE(x.s2, 1)] ^ AES2[BYTE(x.s3, 2)] ^ AES3[BYTE(x.s0, 3)];
+	x.s1 ^= k.s1;
+	k.s2 ^= AES0[BYTE(x.s2, 0)] ^ AES1[BYTE(x.s3, 1)] ^ AES2[BYTE(x.s0, 2)] ^ AES3[BYTE(x.s1, 3)];
+	x.s2 ^= k.s2;
+	k.s3 ^= AES0[BYTE(x.s3, 0)] ^ AES1[BYTE(x.s0, 1)] ^ AES2[BYTE(x.s1, 2)] ^ AES3[BYTE(x.s2, 3)];
 	return k;
 }