Ignore configure checks and include stdbool.h
unconditionally, we're in 2016.

--- gearmand-0.34/libhostile/called.c
+++ gearmand-0.34/libhostile/called.c
@@ -41,6 +41,7 @@
 #include <assert.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdbool.h>
 
 __thread bool is_called_= false;
 static __thread char** unique_ptr= NULL;
--- gearmand-0.34/libhostile/called.h
+++ gearmand-0.34/libhostile/called.h
@@ -36,9 +36,7 @@
 
 #pragma once
 
-#ifdef HAVE_STDBOOL_H
-# include <stdbool.h>
-#endif
+#include <stdbool.h>
 
 bool is_called(void);
 void set_called();