Use prebuilt V8 library by default.

This still retains the ability to build V8 from scratch, with an number
of configurations. The prebuilt binaries were created using

DENO_BUILD_MODE=release ./tools/build.py v8

prebuilt/.gitignore

@@ -0,0 +1,2 @@
+*.a
+*.lib

prebuilt/linux64/libv8.a.sha1

@@ -0,0 +1 @@
+3728bfff7eb91e4e2c96999d974573e4d697e663

prebuilt/mac/libv8.a.sha1

@@ -0,0 +1 @@
+597ca3bbcdc6edbaf23905988f9ca9911bb23250

prebuilt/win/v8.lib.sha1

@@ -0,0 +1 @@
+052b261b8f8a7fc3f1babeb510d5bd73af0bcece

tools/gcloud_upload.py

@@ -0,0 +1,54 @@
+#!/usr/bin/env python
+# Prereq:
+# - gcloud auth login
+# - gcloud config set project deno-223616
+# This program uploads the specified file to GCloud Storage in the denoland
+# bucket. It places a checksum file into the current directory using the base
+# filename of the specified file.
+
+import os
+import sys
+import hashlib
+from util import root_path, run
+from third_party import tp
+
+
+def print_usage():
+    print "Usage: ./tools/gcloud_upload.py target/release/obj/third_party/v8/libv8.a"
+    sys.exit(1)
+
+
+def compute_sha1(filename):
+    m = hashlib.sha1()
+    with open(filename) as f:
+        m.update(f.read())
+    return m.hexdigest()
+
+
+def main(argv):
+    if len(argv) != 2:
+        print_usage()
+    os.chdir(root_path)
+
+    filename = sys.argv[1]
+    basename = os.path.basename(filename)
+
+    sha1 = compute_sha1(filename)
+    print sha1
+
+    gs_url = "gs://denoland/" + sha1
+
+    #gsutil = tp("depot_tools/gsutil.py")
+    gsutil = "gsutil"  # standalone installation
+
+    run([gsutil, "cp", filename, gs_url])
+    run([gsutil, "acl", "ch", "-u", "AllUsers:R", gs_url])
+
+    target_filename = basename + ".sha1"
+    with open(target_filename, 'w') as f:
+        f.write(sha1)
+    print "Wrote", target_filename
+
+
+if __name__ == '__main__':
+    sys.exit(main(sys.argv))

tools/prebuilt.py

@@ -0,0 +1,31 @@
+import sys
+from util import run
+from third_party import tp, google_env
+
+
+def download_v8_prebuilt():
+    if sys.platform == 'win32':
+        sha1_file = "prebuilt/win/v8.lib.sha1"
+    elif sys.platform.startswith('linux'):
+        sha1_file = "prebuilt/linux64/libv8.a.sha1"
+    elif sys.platform == 'darwin':
+        sha1_file = "prebuilt/mac/libv8.a.sha1"
+
+    run([
+        "python",
+        tp('depot_tools/download_from_google_storage.py'),
+        '--platform=' + sys.platform,
+        '--no_auth',
+        '--bucket=denoland',
+        '--sha1_file',
+        sha1_file,
+    ],
+        env=google_env())
+
+
+def load():
+    download_v8_prebuilt()
+
+
+if __name__ == '__main__':
+    sys.exit(load())