qemuxml2argvmock: Mock time() on non-linux platforms too

The qemuxml2argvtest is run on more platforms than linux. For instance
FreeBSD. On these platforms we are, however, not mocking time() which
results in current time being fetched from system and hence tests number
32 and 33 failing.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>

tests/qemuxml2argvmock.c

@@ -20,9 +20,8 @@
 
 #include <config.h>
 
-#ifdef __linux__
-# include "internal.h"
-# include <time.h>
+#include "internal.h"
+#include <time.h>
 
 time_t time(time_t *t)
 {
@@ -31,7 +30,3 @@ time_t time(time_t *t)
         *t = ret;
     return ret;
 }
-
-#else
-/* Nothing to override on non-__linux__ platforms */
-#endif