guix: update to cc30ed170af04565da9b4127def353e7fdd4a489

Package updates:
file 5.44 -> 5.45
(base) glibc 2.35 -> 2.39
grep 3.8 -> 3.11
diffutils 3.8 -> 3.10
gawk 5.2.1 -> 5.3.0
gzip 1.12 -> 1.13
xz 5.2.8 -> 5.4.5
make 4.3 -> 4.4.1
git-minimal 2.45.2 -> 2.48.1
binutils 2.38 -> 2.41
linux-headers 6.1.106 -> 6.1.128

CMake-3.30 becomes available.
Clang/LLVM 19 becomes available.

contrib/guix/libexec/prelude.bash

@@ -51,7 +51,7 @@ fi
 time-machine() {
     # shellcheck disable=SC2086
     guix time-machine --url=https://git.savannah.gnu.org/git/guix.git \
-                      --commit=53396a22afc04536ddf75d8f82ad2eafa5082725 \
+                      --commit=cc30ed170af04565da9b4127def353e7fdd4a489 \
                       --cores="$JOBS" \
                       --keep-failed \
                       --fallback \

contrib/guix/manifest.scm

@@ -455,7 +455,7 @@ inspecting signatures in Mach-O binaries.")
 (define-public glibc-2.31
   (let ((commit "7b27c450c34563a28e634cccb399cd415e71ebfe"))
   (package
-    (inherit glibc) ;; 2.35
+    (inherit glibc) ;; 2.39
     (version "2.31")
     (source (origin
               (method git-fetch)