am bc0e7ee1: Merge "libc: add sys/signal.h for compatibility"

* commit 'bc0e7ee18157c2ffe65644514555689f4259ccfe':
  libc: add sys/signal.h for compatibility
diff --git a/libc/include/sys/signal.h b/libc/include/sys/signal.h
new file mode 100644
index 0000000..2e602da
--- /dev/null
+++ b/libc/include/sys/signal.h
@@ -0,0 +1 @@
+#include <signal.h>