ccache 3.2.3 -> 3.2.4

Bug fixes:
- Fixed build error related to zlib on systems with older make versions
  (regression in ccache 3.2.3).
- Made conversion-to-bool explicit to avoid build warnings (and potential
  runtime errors) on legacy systems.
- Improved signal handling: Kill compiler on SIGTERM; wait for compiler to
  exit before exiting; die appropriately.
- Minor fixes related to Windows support.
- The correct compression level is now used if compression is requested.
- Fixed a bug where cache cleanup could be run too early for caches larger
  than 64 GiB on 32-bit systems.

pkgs/development/tools/misc/ccache/default.nix

@@ -2,8 +2,8 @@
 
 let
   name = "ccache-${version}";
-  version = "3.2.3";
-  sha256 = "03k0fvblwqb80zwdgas8a5fjrwvghgsn587wp3lfr0jr8gy1817c";
+  version = "3.2.4";
+  sha256 = "0pga3hvd80f2p7mz88jmmbwzxh4vn5ihyjx5f6na8y2fclzsjg8w";
 
   ccache =
 stdenv.mkDerivation {