Fix race condition in package-bazel.sh

bazel build -c //src:bazel.exe //src:bazel_nojdk.exe sometimes output
corrupted binaries on Windows.

The reason is when we are executing the genrule for packaging the bazel
zip files, we are writing a "file.list" file into the execroot, however
there is no sandbox on Windows. So two actions are actually sharing the
same path for the "file.list", this PR fixes the issue by writing the
"file.list" file under the tmp dir.

Fixes bazelbuild#16613

src/package-bazel.sh

@@ -37,6 +37,7 @@ ROOT="$(mktemp -d ${TMP_DIR%%/}/bazel.XXXXXXXX)"
 RECOMP="$ROOT/recomp"
 PACKAGE_DIR="$ROOT/pkg"
 DEPLOY_UNCOMP="$ROOT/deploy-uncompressed.jar"
+FILE_LIST="$ROOT/file.list"
 mkdir -p "${PACKAGE_DIR}"
 trap "rm -fr ${ROOT}" EXIT
 
@@ -101,14 +102,14 @@ fi
   find . -type f | sort
   # And install_base_key must be last.
   echo install_base_key
-) > files.list
+) > $FILE_LIST
 
 # Move these after the 'find' above.
 cp $DEPLOY_JAR $PACKAGE_DIR/A-server.jar
 cp $INSTALL_BASE_KEY $PACKAGE_DIR/install_base_key
 
 # Zero timestamps.
-(cd $PACKAGE_DIR; xargs touch -t 198001010000.00) < files.list
+(cd $PACKAGE_DIR; xargs touch -t 198001010000.00) < $FILE_LIST
 
 if [[ "$DEV_BUILD" -eq 1 ]]; then
   # Create output zip with lowest compression, but fast.
@@ -117,6 +118,6 @@ else
   # Create output zip with highest compression, but slow.
   ZIP_ARGS="-q9DX@"
 fi
-(cd $PACKAGE_DIR; zip $ZIP_ARGS $WORKDIR/$OUT) < files.list
+(cd $PACKAGE_DIR; zip $ZIP_ARGS $WORKDIR/$OUT) < $FILE_LIST