Ports: Use SHA256 for the gcc port

This updates the way we verify signatures for the gcc
port because we were previously downloading the keychain
from the mirror which defeats the point of doing signature
checks.

Ports/gcc/package.sh

@@ -3,15 +3,12 @@ port=gcc
 version=11.1.0
 useconfigure=true
 configopts="--target=${SERENITY_ARCH}-pc-serenity --with-sysroot=/ --with-build-sysroot=${SERENITY_INSTALL_ROOT} --with-newlib --enable-languages=c,c++ --disable-lto --disable-nls --enable-shared --enable-default-pie --enable-host-shared --enable-threads=posix"
-files="https://ftpmirror.gnu.org/gnu/gcc/gcc-${version}/gcc-${version}.tar.xz gcc-${version}.tar.xz
-https://ftpmirror.gnu.org/gnu/gcc/gcc-${version}/gcc-${version}.tar.xz.sig gcc-${version}.tar.xz.sig
-https://ftpmirror.gnu.org/gnu/gnu-keyring.gpg gnu-keyring.gpg"
+files="https://ftpmirror.gnu.org/gnu/gcc/gcc-${version}/gcc-${version}.tar.xz gcc-${version}.tar.xz 4c4a6fb8a8396059241c2e674b85b351c26a5d678274007f076957afa1cc9ddf"
 configopts="--target=${SERENITY_ARCH}-pc-serenity --with-sysroot=/ --with-build-sysroot=${SERENITY_BUILD_DIR}/Root --with-newlib --enable-languages=c,c++ --disable-lto --disable-nls --enable-shared --enable-default-pie --enable-host-shared --enable-threads=posix"
 makeopts="all-gcc all-target-libgcc all-target-libstdc++-v3 -j $(nproc)"
 installopts="DESTDIR=${SERENITY_INSTALL_ROOT} install-gcc install-target-libgcc install-target-libstdc++-v3"
 depends="binutils"
-auth_type="sig"
-auth_opts="--keyring ./gnu-keyring.gpg gcc-${version}.tar.xz.sig"
+auth_type="sha256"
 
 post_fetch() {
  run contrib/download_prerequisites