SWDEV-283930 - Fix bugs in HIP Tests on Windows

Windows doesn't have headers unistd.h, sys/wait.h, so
remove them for _WIN64. Also, Windows doesn't have rand_r
so define it. Fixes builds for HIP tests:
d2dMemCpyWithPinnedHostMemory, hipMemset3DFunctional,
hipModuleLoadMultProcessOnMultGPU,
hipModuleLoadUnloadStress, hipModuleNegative,
hipStreamACb_ThrdBehaviour, hipMemcpyNegativeMThrdMSize,
hipStreamACb_MStrm_Mgpu, StreamAddCallback,
hipStreamACb_StrmSyncTiming, hipStreamACb_MultiCalls,
hipMallocConcurrency, hipMemset3DRegressMultiThread,
and hipSetGetDevice.

Change-Id: Id2f98d664716026c590d879e464ba467d4c071be


[ROCm/hip commit: 9edd31100d]

projects/hip/tests/src/runtimeApi/memory/hipMallocConcurrency.cpp

@@ -69,9 +69,10 @@ Testcase Scenarios :
  */
 
 #include <sys/types.h>
+#ifdef __linux__
 #include <sys/wait.h>
 #include <unistd.h>
-
+#endif
 #include <iostream>
 #include <vector>
 #include <limits>

projects/hip/tests/src/runtimeApi/memory/hipMemcpyNegativeMThrdMSize.cpp

@@ -31,7 +31,9 @@ THE SOFTWARE.
  * HIT_END
  */
 
+#ifdef __linux__
 #include <unistd.h>
+#endif
 #include <atomic>
 #include <vector>
 #include "test_common.h"

projects/hip/tests/src/runtimeApi/memory/hipMemset3DRegressMultiThread.cpp

@@ -40,8 +40,10 @@ Testcase Scenarios :
  */
 
 #include <sys/types.h>
+#ifdef __linux__
 #include <sys/wait.h>
 #include <unistd.h>
+#endif
 #include <vector>
 #include "test_common.h"