Merge bitcoin/bitcoin#33342: guix: strip binaries in libexec

3cceda9f48 guix: strip binaries in libexec (fanquake)

Pull request description:

  #31679 moved some internal binaries to `libexec/`, but the Guix build wasn't updated to stip these binaries of their debug symbols.

ACKs for top commit:
  achow101:
    ACK 3cceda9f48
  ryanofsky:
    Code review ACK 3cceda9f48. Good catch and thanks for the fix
  hebasto:
    ACK 3cceda9f48, I've checked Guix build outputs.

Tree-SHA512: 96ad57c2d3670a9ae8c58cdb428918d1dc0fa90014bb7c6fb7a7a68b3ece3fbea9c4fac90a626a005a0edb3cca8b6a33adc9a037fe6b915319387588ffe09e7b

contrib/guix/libexec/build.sh

@@ -290,7 +290,7 @@ mkdir -p "$DISTSRC"
             *)
                 # Split binaries from their debug symbols
                 {
-                    find "${DISTNAME}/bin" -type f -executable -print0
+                    find "${DISTNAME}/bin" "${DISTNAME}/libexec" -type f -executable -print0
                 } | xargs -0 -P"$JOBS" -I{} "${DISTSRC}/build/split-debug.sh" {} {} {}.dbg
                 ;;
         esac