Issue 6286 - Remove common scripts duplicating

third_party/libadblockplus/BUILD.gn

 # Build libadblockplus using make
 action("make") {
-  script = "subproc.py"
+  script = "//third_party/libadblockplus_common/subproc.py"

[sergei, 2018/01/19 09:01:57]

Does "//" has a special meaning here? I would expect it to be an absolute path,
but there is likely nothing at such location.

[sergei, 2018/01/19 09:38:33]

Acknowledged.

   _cwd = rebase_path(".")
   _build_dir="${target_out_dir}/build"
   _abs_build_dir=rebase_path("${_build_dir}")
   
   inputs = [
   ]
 
   outputs = [
     "${_build_dir}/local/armeabi-v7a/libadblockplus.a",
     "${_build_dir}/android_arm.release/libv8_libplatform.a",
@@ skipping 22 matching lines @@
 
     # workaround for building for Target platform on Linux GYP issue
     "--envCXX.host=g++",
     "--envCC.host=gcc"
   ]
 }
 
 config("headers") {
   include_dirs = [ "include" ]
 }