use pyyaml from deps

Author: iskakaushik

DEPS

@@ -138,6 +138,8 @@ deps = {
   'src/third_party/spirv_cross':
    Var('github_git') + '/KhronosGroup/SPIRV-Cross.git' + '@' + '418542eaefdb609f548d25a1e3962fb69d80da63',
 
+  'src/third_party/pyyaml':
+   Var('fuchsia_git') + '/third_party/pyyaml' + '@' + '0d71b7df69ec44d1e8cfd81dc580a9612c0e5e21',
 
    # Chromium-style
    #

tools/fuchsia/sdk/find_dart_libraries.py

@@ -13,12 +13,10 @@
 
 import argparse
 import json
-import yaml
 import os
 import sys
 import pkg_resources
 
-
 def find_package(root, local_paths, package, version):
     """Return the package target if found with at least this version"""
     needed_version = pkg_resources.parse_version(version)
@@ -69,6 +67,9 @@ def main():
         assert len(versioned_dart_packages) % 2 == 0, (
             'Each third_party_dep package must be accompanied by a version')
 
+    sys.path += [os.path.join(args.root, 'third_party', 'pyyaml', 'lib3')]
+    import yaml
+
     dart_package_paths = []
     it = iter(versioned_dart_packages)
     for item in it: