lib: Include stdbool.h in int_lib.h, and eliminate duplicate includes from a number of source files.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@144671 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/enable_execute_stack.c b/lib/enable_execute_stack.c
index 7ab8e8d..278ca24 100644
--- a/lib/enable_execute_stack.c
+++ b/lib/enable_execute_stack.c
@@ -8,7 +8,8 @@
  * ===----------------------------------------------------------------------===
  */
 
-#include <stdint.h>
+#include "int_lib.h"
+
 #include <sys/mman.h>
 
 /* #include "config.h"