tests/qtest: machine-none-test: Use double quotes to pass the cpu option

Single quotes in the arguments (e.g.: -cpu 'qemu64,apic-id=0') are
not removed in the Windows environment before it is passed to the
QEMU executable. Such argument causes a failure in the QEMU CPU
option parser codes.

Change to use double quotes which works fine on all platforms.

Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20220824094029.1634519-37-bmeng.cn@gmail.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/qtest/machine-none-test.c

@@ -81,7 +81,7 @@ static void test_machine_cpu_cli(void)
                 " add it to cpus_map\n", arch);
         return; /* TODO: die here to force all targets have a test */
     }
-    qts = qtest_initf("-machine none -cpu '%s'", cpu_model);
+    qts = qtest_initf("-machine none -cpu \"%s\"", cpu_model);
 
     response = qtest_qmp(qts, "{ 'execute': 'quit' }");
     g_assert(qdict_haskey(response, "return"));