[SYCL] Revert inadvertant change in test from previous commit

@premanandrao saw that I had accidentially left a line in the test
commented out while debugging. Revert the commented out line to still be
testing what it is supposed to be testing.

Signed-off-by: Erich Keane <erich.keane@intel.com>

Author: Erich Keane

clang/lib/Sema/SemaSYCL.cpp

@@ -1407,7 +1407,7 @@ Sema::DeviceDiagBuilder Sema::SYCLDiagIfDeviceCode(SourceLocation Loc,
                                                    unsigned DiagID) {
   assert(getLangOpts().SYCLIsDevice &&
          "Should only be called during SYCL compilation");
-  FunctionDecl *FD = dyn_cast<FunctionDecl>(CurContext);
+  FunctionDecl *FD = dyn_cast<FunctionDecl>(getCurLexicalContext());
   DeviceDiagBuilder::Kind DiagKind = [this, FD] {
     if (ConstructingOpenCLKernel || (FD && FD->isDependentContext()))
       return DeviceDiagBuilder::K_Nop;

clang/test/SemaSYCL/sycl-cconv.cpp

@@ -8,7 +8,7 @@ __inline __cdecl __attribute__((sycl_device)) int foo() { return 0; }
 __inline __cdecl int moo() { return 0; }
 
 void bar() {
-  //printf("hello\n"); // expected-no-error
+  printf("hello\n"); // expected-no-error
 }
 
 template <typename name, typename Func>