Update '-list' option (#2457)

'-list' option is used to print all sub-tests. But some test do not
support it at all. And all test do not display it the same way, making
it quite complicated for external tools to extract them.

That CL clean the usage so that tests:
- Print the sub-tests list with either '-list' (to prevent breaking
legacy usage) or '--list' (to match other options)
- Do not print anything else when the option is used

test_conformance/spir/main.cpp

@@ -6713,6 +6713,14 @@ cl_device_id get_platform_device (cl_device_type device_type, cl_uint choosen_de
     return devices[choosen_device_index];
 }
 
+static void ListTests()
+{
+    for (unsigned int i = 0; i < (sizeof(spir_suites) / sizeof(sub_suite)); i++)
+    {
+        log_info("\t%s\n", spir_suites[i].name);
+    }
+}
+
 
 /**
  Parses the command line parameters and set the
@@ -6761,7 +6769,7 @@ static int ParseCommandLine (int argc, const char *argv[],
         /* Process the command line arguments */
 
     /* Special case: just list the tests */
-    if( ( argc > 1 ) && (!strcmp( argv[ 1 ], "-list" ) || !strcmp( argv[ 1 ], "-h" ) || !strcmp( argv[ 1 ], "--help" )))
+    if ((argc > 1) && (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")))
     {
         log_info( "Usage: %s [<suite name>] [pid<num>] [id<num>] [<device type>] [w32] [no-unzip]\n", argv[0] );
         log_info( "\t<suite name>\tOne or more of: (default all)\n");
@@ -6771,10 +6779,12 @@ static int ParseCommandLine (int argc, const char *argv[],
         log_info( "\tw32\t\tIndicates device address bits is 32.\n" );
         log_info( "\tno-unzip\t\tDo not extract test files from Zip; use existing.\n" );
 
-        for( unsigned int i = 0; i < (sizeof(spir_suites) / sizeof(sub_suite)); i++ )
-        {
-            log_info( "\t\t%s\n", spir_suites[i].name );
-        }
+        ListTests();
+        return 0;
+    }
+    else if (!strcmp(argv[1], "--list") || !strcmp(argv[1], "-list"))
+    {
+        ListTests();
         return 0;
     }