[SYCL][E2E] Fix preview flag detection for CUDA and HIP (intel#11929)

The detection of support for -fpreview-breaking-changes was failing in
E2E unintentionally. This commit fixes this detection.

---------

Signed-off-by: Larsen, Steffen <[email protected]>
(cherry picked from commit bc30bef)

Author: steffenlarsen

sycl/test-e2e/Basic/built-ins/vec_common.cpp

@@ -1,6 +1,6 @@
 // RUN: %{build} -o %t.out
 // RUN: %{run} %t.out
-// RUN: %if preview-breaking-changes-supported %{ %clangxx -fsycl -fpreview-breaking-changes %s -o %t2.out %}
+// RUN: %if preview-breaking-changes-supported %{ %{build} -fpreview-breaking-changes -o %t2.out %}
 // RUN: %if preview-breaking-changes-supported %{ %{run} %t2.out %}
 
 #ifdef _WIN32

sycl/test-e2e/Basic/built-ins/vec_geometric.cpp

@@ -1,7 +1,7 @@
 // RUN: %{build} -o %t.out
 // RUN: %{run} %t.out
-// RUN: %if preview-breaking-changes-supported %{ %clangxx -fsycl -fpreview-breaking-changes %s -o %t2.out %}
-// RUN: %if preview-breaking-changes-supported %{  %{run} %t2.out %}
+// RUN: %if preview-breaking-changes-supported %{ %{build} -fpreview-breaking-changes -o %t2.out %}
+// RUN: %if preview-breaking-changes-supported %{ %{run} %t2.out %}
 
 #include <sycl/sycl.hpp>
 

sycl/test-e2e/Basic/built-ins/vec_math.cpp

@@ -2,7 +2,7 @@
 
 // RUN: %{build} %{mathflags} -o %t.out
 // RUN: %{run} %t.out
-// RUN: %if preview-breaking-changes-supported %{ %clangxx -fsycl -fpreview-breaking-changes %{mathflags} %s -o %t2.out %}
+// RUN: %if preview-breaking-changes-supported %{ %{build} -fpreview-breaking-changes %{mathflags} -o %t2.out %}
 // RUN: %if preview-breaking-changes-supported %{ %{run} %t2.out %}
 
 #include <sycl/sycl.hpp>

sycl/test-e2e/Basic/built-ins/vec_relational.cpp

@@ -1,7 +1,7 @@
 // RUN: %{build} -o %t.out
 // RUN: %{run} %t.out
-// RUN: %if preview-breaking-changes-supported %{ %clangxx -fsycl -fpreview-breaking-changes %s -o %t2.out %}
-// RUN: %if preview-breaking-changes-supported %{  %{run} %t2.out %}
+// RUN: %if preview-breaking-changes-supported %{ %{build} -fpreview-breaking-changes -o %t2.out %}
+// RUN: %if preview-breaking-changes-supported %{ %{run} %t2.out %}
 
 #include <sycl/sycl.hpp>
 

sycl/test-e2e/Basic/vec_bool.cpp

@@ -1,8 +1,8 @@
 // RUN: %{build} -o %t.out
 // RUN: %{run} %t.out
 
-// RUN: %if preview-breaking-changes-supported %{ %clangxx -fsycl -fpreview-breaking-changes %s -o %t2.out %}
-// RUN: %if preview-breaking-changes-supported %{  %{run} %t2.out %}
+// RUN: %if preview-breaking-changes-supported %{ %{build} -fpreview-breaking-changes -o %t2.out %}
+// RUN: %if preview-breaking-changes-supported %{ %{run} %t2.out %}
 
 //==-------------- vec_bool.cpp - SYCL vec<> for bool test -----------------==//
 //

sycl/test-e2e/Basic/vector_byte.cpp

@@ -1,8 +1,8 @@
 // RUN: %{build} -std=c++17 -o %t.out
 // RUN: %{run} %t.out
 
-// RUN: %if preview-breaking-changes-supported %{ %clangxx -fsycl -fpreview-breaking-changes -std=c++17 %s -o %t2.out %}
-// RUN: %if preview-breaking-changes-supported %{  %{run} %t2.out %}
+// RUN: %if preview-breaking-changes-supported %{ %{build} -fpreview-breaking-changes -std=c++17 -o %t2.out %}
+// RUN: %if preview-breaking-changes-supported %{ %{run} %t2.out %}
 
 //==---------- vector_byte.cpp - SYCL vec<> for std::byte test -------------==//
 //