Fix include path when pointing to Node.js source

Header files for deps are in a different location in the Node.js
source tree compared to the release tarballs.

Author: richardlau

addon.gypi

@@ -7,8 +7,12 @@
     'include_dirs': [
       '<(node_root_dir)/include/node',
       '<(node_root_dir)/src',
+      '<(node_root_dir)/deps/cares/include',
+      '<(node_root_dir)/deps/openssl/config',
+      '<(node_root_dir)/deps/openssl/openssl/include/openssl',
       '<(node_root_dir)/deps/uv/include',
-      '<(node_root_dir)/deps/v8/include'
+      '<(node_root_dir)/deps/v8/include',
+      '<(node_root_dir)/deps/zlib'
     ],
     'defines!': [
       'BUILDING_UV_SHARED=1',  # Inherited from common.gypi.