[PATCH 2/6] GNU/Hurd: fix missing signal.h including.

[Yuqian Yang <crupest@crupest.life>]

signal.h must be included in test_helpers.cc for
usage of SIGABRT.
---
 absl/log/internal/test_helpers.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/absl/log/internal/test_helpers.cc b/absl/log/internal/test_helpers.cc
index bfcc9679..72fff4d5 100644
--- a/absl/log/internal/test_helpers.cc
+++ b/absl/log/internal/test_helpers.cc
@@ -18,6 +18,10 @@
 #include <zircon/syscalls.h>
 #endif
 
+#ifdef __GNU__
+#include <signal.h>
+#endif
+
 #include "gtest/gtest.h"
 #include "absl/base/config.h"
 #include "absl/base/log_severity.h"
-- 
Yuqian Yang <crupest@crupest.life>