CC3D - Change the default alignment of the board to match the default

open pilot alignment.

This makes it easier for new users to adopt cleanflight without having
to look up the alignment cli settings or rotate their boards in their
existing aircraft.

See discussion here:

http://forums.openpilot.org/topic/43569-baseflightcleanflight-ported-to-cc3d/?p=360886

src/main/sensors/initialisation.c

@@ -229,6 +229,9 @@ bool detectGyro(uint16_t gyroLpf)
 
 #ifdef USE_GYRO_SPI_MPU6000
     if (mpu6000SpiGyroDetect(&gyro, gyroLpf)) {
+#ifdef CC3D
+        gyroAlign = CW270_DEG;
+#endif
         return true;
     }
 #endif
@@ -320,6 +323,9 @@ retry:
         case ACC_SPI_MPU6000:
             if (mpu6000SpiAccDetect(&acc)) {
                 accHardware = ACC_SPI_MPU6000;
+#ifdef CC3D
+                accAlign = CW270_DEG;
+#endif
                 if (accHardwareToUse == ACC_SPI_MPU6000)
                     break;
             }