[SYCL][E2E] Avoid unused argument warning for imf_fp16_trivial_test (#16049)

The imf_fp16_trivial_test has a clangxx invocation with only object
files. On Windows, this invocation may have /EHsc, which in this case
will be ignored. This issues a warning, which in turn becomes an error
when -Werror is set. To avoid this, we ignore unused-argument warnings
for this specific invocation.

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

Author: steffenlarsen

sycl/test-e2e/DeviceLib/imf_fp16_trivial_test.cpp

@@ -5,7 +5,7 @@
 
 // RUN: %{build} %{mathflags} -c -DSOURCE1 -o %t1.o
 // RUN: %{build} %{mathflags} -c -DSOURCE2 -o %t2.o
-// RUN: %clangxx -fsycl  %t1.o %t2.o  -o %t.out
+// RUN: %clangxx -Wno-error=unused-command-line-argument -fsycl  %t1.o %t2.o  -o %t.out
 // RUN: %{run} %t.out
 
 // UNSUPPORTED: cuda, hip