[SYCL][E2E] Fix threadling lib linking in tests on Windows (#15578)

This commit fixes the use of -lpthread to the %threads_lib macro to
allow testing on Windows.

Signed-off-by: Larsen, Steffen <[email protected]>

Author: steffenlarsen

sycl/test-e2e/Regression/commandlist/gpu.cpp

@@ -1,4 +1,4 @@
-// REQUIRES: gpu, linux
+// REQUIRES: gpu
 
-// RUN: %clangxx -Wno-error=vla-cxx-extension -fsycl -fsycl-targets=%{sycl_triple} %S/Inputs/FindPrimesSYCL.cpp %S/Inputs/main.cpp -o %t.out -lpthread
+// RUN: %clangxx -Wno-error=vla-cxx-extension -fsycl -fsycl-targets=%{sycl_triple} %S/Inputs/FindPrimesSYCL.cpp %S/Inputs/main.cpp -o %t.out %threads_lib
 // RUN: %{run} %t.out

sycl/test-e2e/Scheduler/CommandCleanupThreadSafety.cpp

@@ -1,5 +1,4 @@
-// UNSUPPORTED: windows
-// RUN: %{build} -o %t.out -lpthread
+// RUN: %{build} -o %t.out %threads_lib
 // RUN: %{run} %t.out
 
 #include <sycl/detail/core.hpp>

sycl/test-e2e/syclcompat/device/device_threaded.cpp

@@ -29,9 +29,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-// REQUIRES: linux
-
-// RUN: %{build} -lpthread -o %t.out
+// RUN: %{build} %threads_lib -o %t.out
 // RUN: %{run} %t.out
 
 #include <syclcompat/device.hpp>