[PATCH 1/2] tools: sepdebugcrcfix: fix build with c23

[Sam James]

Avoid redefining bool:
```
  CC       tools/sepdebugcrcfix-sepdebugcrcfix.o
tools/sepdebugcrcfix.c:47:13: error: two or more data types in declaration specifiers
   47 | typedef int bool;
      |             ^~~~
tools/sepdebugcrcfix.c:47:1: warning: useless type name in empty declaration
   47 | typedef int bool;
      | ^~~~~~~
tools/sepdebugcrcfix.c:48:19: error: expected identifier or ‘(’ before ‘false’
   48 | static const bool false = 0, true = 1;
      |                   ^~~~~
```

While here, include `<stdbool.h>` for older C standards than C23.
---
 tools/sepdebugcrcfix.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/tools/sepdebugcrcfix.c b/tools/sepdebugcrcfix.c
index 7464f6a..b505019 100644
--- a/tools/sepdebugcrcfix.c
+++ b/tools/sepdebugcrcfix.c
@@ -27,6 +27,7 @@
 #include <unistd.h>
 #include <sys/mman.h>
 #include <endian.h>
+#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <error.h>
@@ -44,9 +45,6 @@
 
 static_assert (sizeof (unsigned long) >= sizeof (uint32_t));
 
-typedef int bool;
-static const bool false = 0, true = 1;
-
 /* This is bfd_calc_gnu_debuglink_crc32 from bfd/opncls.c.  */
 static unsigned long
     calc_gnu_debuglink_crc32 (unsigned long crc,
-- 
2.46.0