Separate win and lin tests for bit_cast

Author: maximdimakov

sycl/test/regression/bit_cast.cpp renamed to sycl/test/regression/bit_cast.hpp

@@ -1,4 +1,3 @@
-// RUN: %clangxx -fsycl -fsycl-host-compiler=g++ -fsycl-host-compiler-options='-std=c++17' %s -o %t.out
 // The purpose of this test is to check that the following code can be
 // successfully compiled
 

sycl/test/regression/bit_cast_lin.cpp

@@ -0,0 +1,4 @@
+// RUN: %clangxx -fsycl -fsycl-host-compiler=g++ -fsycl-host-compiler-options='-std=c++17' %s -o %t.out
+// UNSUPPORTED: windows
+
+#include "bit_cast.hpp"

sycl/test/regression/bit_cast_win.cpp

@@ -0,0 +1,4 @@
+// RUN: %clangxx -fsycl -fsycl-host-compiler=cl -fsycl-host-compiler-options='-std=c++17' %s -o %t.out
+// UNSUPPORTED: linux
+
+#include "bit_cast.hpp"