ansible: update gn on V8 build machines

[richardlau]

Roll forward the version of gn used to build V8.

Clean git checkout before building.

Refs: nodejs/node#57753 (comment)

---

Deployment

• test-osuosl-rhel8-ppc64_le-1
• test-osuosl-rhel8-ppc64_le-2
• test-osuosl-rhel8-ppc64_le-3
• test-osuosl-rhel8-ppc64_le-4
• test-ibm-rhel8-s390x-1
• test-ibm-rhel8-s390x-2
• test-ibm-rhel8-s390x-3
• test-ibm-rhel8-s390x-4

[richardlau]

Test builds:

• nodejs/node@84d01ac from [help wanted] deps: update V8 to 13.6 node#57753: https://ci.nodejs.org/job/node-test-commit-v8-linux/6493/
• v18.x-staging (check we can still build older V8): https://ci.nodejs.org/job/node-test-commit-v8-linux/6494/

[richardlau]

FTR the added git clean -fdX is to prevent this error (presumably built artifacts from earlier gn incompatible with later ones):

ninja: Entering directory `out'
[1/252] AR base.a
FAILED: base.a
ar rcsT base.a src/base/command_line.o src/base/environment.o src/base/files/file.o src/base/files/file_enumerator.o src/base/files/file_path.o src/base/files/file_path_constants.o src/base/files/file_util.o src/base/files/scoped_file.o src/base/files/scoped_temp_dir.o src/base/json/json_parser.o src/base/json/json_reader.o src/base/json/json_writer.o src/base/json/string_escape.o src/base/logging.o src/base/md5.o src/base/memory/ref_counted.o src/base/memory/weak_ptr.o src/base/sha1.o src/base/strings/string_number_conversions.o src/base/strings/string_split.o src/base/strings/string_util.o src/base/strings/string_util_constants.o src/base/strings/stringprintf.o src/base/strings/utf_string_conversion_utils.o src/base/strings/utf_string_conversions.o src/base/timer/elapsed_timer.o src/base/value_iterators.o src/base/values.o src/base/files/file_enumerator_posix.o src/base/files/file_posix.o src/base/files/file_util_posix.o src/base/posix/file_descriptor_shuffle.o src/base/posix/safe_strerror.o
ar: base.a: malformed archive
[6/252] CXX src/gn/c_tool.o
ninja: build stopped: subcommand failed.