tests/eina: make inclusion for define explicit and more compatible

Summary:
signal.h is not included with all build options somehow, making this
a bit unreliable. also check for define existence for random platforms
which don't define this symbol

Reviewers: devilhorns, ManMower

Reviewed By: ManMower

Subscribers: ManMower, cedric, #committers

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D6535

src/tests/eina/eina_test_debug.c

@@ -5,8 +5,10 @@
 #include <Eina.h>
 
 #include "eina_suite.h"
-
 #ifndef _WIN32
+# include <signal.h>
+#endif
+#ifdef SIGPROF
 EFL_START_TEST(eina_test_debug_sighandler)
 {
    /* ensure this doesn't crash */
@@ -18,7 +20,7 @@ EFL_END_TEST
 void
 eina_test_debug(TCase *tc)
 {
-#ifndef _WIN32
+#ifdef SIGPROF
    if (!eina_streq(getenv("CK_FORK"), "no"))
      tcase_add_test_raise_signal(tc, eina_test_debug_sighandler, SIGPROF);
 #endif