Install link wrapper in runhooks, and turn incremental on by default

DEPS

 vars = {
   # Use this googlecode_url variable only if there is an internal mirror for it.
   # If you do not know, use the full path while defining your new deps entry.
   "googlecode_url": "http://%s.googlecode.com/svn",
   "webkit_trunk": "http://svn.webkit.org/repository/webkit/trunk",
   "nacl_trunk": "http://src.chromium.org/native_client/trunk",
   "webkit_revision": "94417",
   "chromium_git": "http://git.chromium.org/git",
   "swig_revision": "69281",
   "nacl_revision": "6605",
@@ skipping 407 matching lines @@
          "--file-hash", "linux_x86_newlib",
              Var("nacl_toolchain_linux_x86_newlib_hash"),
     ],
   },
   {
     # A change to a .gyp, .gypi, or to GYP itself should run the generator.
     "pattern": ".",
     "action": ["python", "src/build/gyp_chromium"],
   },
 ]
+
+import sys

[bradn, 2011/09/06 23:56:19]

Lots of stuff (more than should) processes deps, lets not do arbitrary python
here. Can we make this run unconditionally and then do the platform check inside
the script?

[M-A Ruel, 2011/09/07 15:39:43]

Exact.

+if sys.platform == "win32":
+  hooks.insert(0,
+    {
+      # This builds and installs a shim for link.exe that allows using "Use
+      # Library Dependency Inputs" in VS.
+      "pattern": ".",
+      "action": [
+        "python", "src/tools/supalink/install_supalink.py"
+      ]
+    })