[Driver][SYCL] Correct optimization disabling option for gen (#2622)

When performing AOT for gen, we were passing the wrong optimization
disabling option.  Update to use -cl-opt-disable

Author: mdtoguchi

clang/lib/Driver/ToolChains/SYCL.cpp

@@ -510,7 +510,7 @@ static void addImpliedArgs(const llvm::Triple &Triple,
     if (!A->getOption().matches(options::OPT_g0))
       BeArgs.push_back("-g");
   if (Args.getLastArg(options::OPT_O0))
-    BeArgs.push_back(IsGen ? "-O0" : "-cl-opt-disable");
+    BeArgs.push_back("-cl-opt-disable");
   if (BeArgs.empty())
     return;
   if (Triple.getSubArch() == llvm::Triple::NoSubArch ||

clang/test/Driver/sycl-offload.c

@@ -758,7 +758,7 @@
 // RUN:   | FileCheck -check-prefix=CHK-TOOLS-IMPLIED-OPTS-GEN %s
 // RUN:   %clang_cl -### -fsycl -fsycl-targets=spir64_gen-unknown-unknown-sycldevice -Zi -Od -Xsycl-target-backend "-DFOO1 -DFOO2" %s 2>&1 \
 // RUN:   | FileCheck -check-prefix=CHK-TOOLS-IMPLIED-OPTS-GEN %s
-// CHK-TOOLS-IMPLIED-OPTS-GEN: ocloc{{.*}} "-options" "-g -O0" "-DFOO1" "-DFOO2"
+// CHK-TOOLS-IMPLIED-OPTS-GEN: ocloc{{.*}} "-options" "-g -cl-opt-disable" "-DFOO1" "-DFOO2"
 
 /// Check -Xsycl-target-linker option passing
 // RUN:   %clang -### -target x86_64-unknown-linux-gnu -fsycl -fsycl-targets=spir64_fpga-unknown-unknown-sycldevice -Xsycl-target-linker "-DFOO1 -DFOO2" %s 2>&1 \