Merge bitcoin/bitcoin#29828: guix: remove gcc-toolchain static from Windows build

05da246 guix: remove gcc-toolchain static from Windows build (fanquake)

Pull request description:

  The libs in this dir are the following:
  ```bash
  ls /gnu/store/2vnbkrdin4rrf7ygnr80mlcglin4qqa4-gcc-toolchain-12.3.0-static/lib/
  libanl.a           libc.a             libdl.a         libm.a
  libBrokenLocale.a  libcrypt.a         libg.a          libmcheck.a
  libpthread.a       librt.a
  libresolv.a        libutil.a
  ```

  These do not need to be propogated into the Windows build environment.

  Guix Build (aarch64):
  ```bash
  450c0c4f45f9cb7ed7fc2ef6e7557b6a23004b82c951399da3b7635e8451a076  guix-build-05da2460db89/output/dist-archive/bitcoin-05da2460db89.tar.gz
  5df68ab18636090c387bc90297356d0e148b02931d3a99c0f6d33cd268aa072b  guix-build-05da2460db89/output/x86_64-w64-mingw32/SHA256SUMS.part
  13e979f60d9296aa11081fbbb360404da9fbb797bb4663ed2d1189d800659b4f  guix-build-05da2460db89/output/x86_64-w64-mingw32/bitcoin-05da2460db89-win64-debug.zip
  d1cc78437a96f012a59af7c757bef592f163559e523d45014d7804d0be29a8b8  guix-build-05da2460db89/output/x86_64-w64-mingw32/bitcoin-05da2460db89-win64-setup-unsigned.exe
  33a9cfd4475677646bb32c9c45c25bd796ca5adb126590bf556d4e6f9592c676  guix-build-05da2460db89/output/x86_64-w64-mingw32/bitcoin-05da2460db89-win64-unsigned.tar.gz
  5d2ee251668d3d31bf378826ab06f98542dd20926cdee2df5c3315e11222a519  guix-build-05da2460db89/output/x86_64-w64-mingw32/bitcoin-05da2460db89-win64.zip
  ```

  Somewhat similar to #29673.

ACKs for top commit:
  laanwj:
    ACK 05da246
  hebasto:
    ACK 05da246,

Tree-SHA512: bf514a726a22e2bfae4de645b10d90a66fe090971340c4299aeb9b2ff9cf536ca6cfed274d312ea5d5a172775cbda6db0e609492ec603f5aee55c8de81462cc0

Author: fanquake

contrib/guix/libexec/build.sh

@@ -75,9 +75,8 @@ export OBJC_INCLUDE_PATH="${NATIVE_GCC}/include"
 export OBJCPLUS_INCLUDE_PATH="${NATIVE_GCC}/include/c++:${NATIVE_GCC}/include"
 
 case "$HOST" in
-    *darwin*)
-        export LIBRARY_PATH="${NATIVE_GCC}/lib"
-        ;;
+    *darwin*) export LIBRARY_PATH="${NATIVE_GCC}/lib" ;;
+    *mingw*) export LIBRARY_PATH="${NATIVE_GCC}/lib" ;;
     *)
         NATIVE_GCC_STATIC="$(store_path gcc-toolchain static)"
         export LIBRARY_PATH="${NATIVE_GCC}/lib:${NATIVE_GCC_STATIC}/lib"

contrib/guix/manifest.scm

@@ -517,7 +517,6 @@ inspecting signatures in Mach-O binaries.")
     (cond ((string-suffix? "-mingw32" target)
            (list ;; Native GCC 12 toolchain
                  gcc-toolchain-12
-                 (list gcc-toolchain-12 "static")
                  zip
                  (make-mingw-pthreads-cross-toolchain "x86_64-w64-mingw32")
                  nsis-x86_64