[release] Add cmake as an extra tarball and not bundle it

Revert "Add cmake/ to release tarballs via concatenation"

This reverts commit 3a33664.

Revert "Add cmake to source release tarballs"

This reverts commit 32a0482.

Reviewed By: tstellar, aaronpuchert

Differential Revision: https://reviews.llvm.org/D125798

llvm/utils/release/export.sh

@@ -13,7 +13,7 @@
 
 set -e
 
-projects="llvm clang compiler-rt libcxx libcxxabi libclc clang-tools-extra polly lldb lld openmp libunwind flang"
+projects="llvm clang cmake compiler-rt libcxx libcxxabi libclc clang-tools-extra polly lldb lld openmp libunwind flang"
 
 release=""
 rc=""
@@ -128,21 +128,10 @@ export_sources() {
             -cJf test-suite-$release$rc.src.tar.xz test-suite-$release$rc.src
     fi
 
-    # Package up top-level cmake directory so that we can append it to all projects.
-    tmp_dir=$(mktemp -d)
-    cmake_archive_file=$tmp_dir/cmake.tar
-    trap "rm -rv $tmp_dir" EXIT
-    pushd $llvm_src_dir
-    git archive -o $cmake_archive_file $tree_id cmake/
-    popd
-
     for proj in $projects; do
         echo "Creating tarball for $proj ..."
         pushd $llvm_src_dir/$proj
-        tmp_archive_file=$tmp_dir/$proj.tar
-        git archive --prefix=$proj-$release$rc.src/ -o $tmp_archive_file $tree_id .
-        tar -Af $tmp_archive_file $cmake_archive_file
-        xz < $tmp_archive_file > $target_dir/$(template_file $proj)
+        git archive --prefix=$proj-$release$rc.src/ $tree_id . | xz >$target_dir/$(template_file $proj)
         popd
     done
 }