added host flags to hipDeviceBody test

hipamd/tests/src/hipDeviceBody.cpp

@@ -1,5 +1,5 @@
 #include"hipDeviceHeader.h"
 
-__device__ int add(int &a, int &b){
+__host__ __device__ int add(int &a, int &b){
     return a+b;
 }

hipamd/tests/src/hipDeviceHeader.h

@@ -1,6 +1,7 @@
 #ifndef HIPDEVICEHEADER_H
 #define HIPDEVICEHEADER_H
 #include"test_common.h"
-__device__ int add(int a, int b);
+
+__host__ __device__ int add(int a, int b);
 
 #endif