boxfs: fix build with gcc15 (#508519)

pkgs/by-name/bo/boxfs/package.nix

@@ -44,6 +44,7 @@ stdenv.mkDerivation {
   patches = [
     ./work-around-API-borkage.patch
     ./libapp-include-ctype.diff
+    ./use-stdbool.patch
   ];
 
   buildInputs = [

pkgs/by-name/bo/boxfs/use-stdbool.patch

@@ -0,0 +1,18 @@
+diff --git a/tmp/orig_base.h b/libapp/libapp/base.h
+index 7d8abdb..2f42b03 100644
+--- a/tmp/orig_base.h
++++ b/libapp/libapp/base.h
+@@ -1,12 +1,7 @@
+ #ifndef APP_BASE_H
+ #define APP_BASE_H
+ 
+-#ifndef __cplusplus
+-typedef enum {
+-        false = 0,
+-        true = 1
+-} bool;
+-#endif
++#include <stdbool.h>
+ 
+ #define ASSERT(clause) if( !clause) { fprintf(stderr, "Assertion '%s' failed at %s:%d\n", #clause, __FILE__, __LINE__ ); exit(-1); }
+