make sure the build creates the output dir if it does not exist

Author: rogchap

.gitignore

@@ -4,3 +4,6 @@
 build
 .cipd
 .gclient_entries
+
+# ignore libs for now
+*.a

.gitmodules

@@ -1,7 +1,6 @@
 [submodule "deps/v8"]
 	path = deps/v8
 	url = https://chromium.googlesource.com/v8/v8.git
-	branch = 7.6.303
 [submodule "deps/depot_tools"]
 	path = deps/depot_tools
 	url = https://chromium.googlesource.com/chromium/tools/depot_tools.git

deps/build.py

@@ -88,7 +88,10 @@ def main():
                         env=env)
 
     lib_fn = os.path.join(build_path, "obj/libv8_monolith.a")
-    dest_fn = os.path.join(deps_path, os_arch(), 'libv8.a')
+    dest_path = os.path.join(deps_path, os_arch())
+    if not os.path.exists(dest_path):
+        os.makedirs(dest_path)
+    dest_fn = os.path.join(dest_path, 'libv8.a')
     shutil.copy(lib_fn, dest_fn)