tests: Fix 'make test' for i686 hosts (build regression)

'make test' is broken at least since commit
baacf047. Several source files were moved
to util/, and some of them there split, so add the missing prefix and new
files to fix the compiler and linker errors.

There remain more issues, but these changes allow running the test on a
Linux i686 host.

Cc: qemu-stable@nongnu.org
Signed-off-by: NStefan Weil <sw@weilnetz.de>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

tests/tcg/test_path.c

 /* Test path override code */
 #define _GNU_SOURCE
 #include "config-host.h"
-#include "iov.c"
-#include "cutils.c"
-#include "path.c"
-#include "trace.c"
+#include "util/cutils.c"
+#include "util/hexdump.c"
+#include "util/iov.c"
+#include "util/path.c"
+#include "util/qemu-timer-common.c"
+#include "trace/control.c"
+#include "../trace/generated-events.c"
 #ifdef CONFIG_TRACE_SIMPLE
-#include "../trace/simple.c"
+#include "trace/simple.c"
 #endif
 
 #include <stdarg.h>