DeformableConvRT.h fixes ,cmake cuda arch auto detection

cmake/getCudaArch.cu

@@ -0,0 +1,20 @@
+#include <stdio.h>
+
+int main(int argc, char **argv){
+    cudaDeviceProp dP;
+    float min_cc = 5.0;
+
+    int rc = cudaGetDeviceProperties(&dP, 0);
+    if(rc != cudaSuccess) {
+        cudaError_t error = cudaGetLastError();
+        printf("CUDA error: %s", cudaGetErrorString(error));
+        return rc; /* Failure */
+    }
+    if((dP.major+(dP.minor/10)) < min_cc) {
+        printf("Min Compute Capability of %2.1f required:  %d.%d found\n Not Building CUDA Code", min_cc, dP.major, dP.minor);
+        return 1; /* Failure */
+    } else {
+        printf("-arch=sm_%d%d", dP.major, dP.minor);
+        return 0; /* Success */
+    }
+}