GN: Use implicit dependency for binary input deps

tools/gn/docs/reference.md

 # GN Reference
 
 *This page is automatically generated from* `gn help --markdown all`.
 
 ## **\--args**: Specifies build arguments overrides.
 
 ```
   See "gn help buildargs" for an overview of how build arguments work.
 
   Most operations take a build directory. The build arguments are taken
@@ skipping 4770 matching lines @@
 ```
 
 ### **Inputs for binary targets**
 
 ```
   Any input dependencies will be resolved before compiling any sources.
   Normally, all actions that a target depends on will be run before any
   files in a target are compiled. So if you depend on generated headers,
   you do not typically need to list them in the inputs section.
 
-  Inputs for binary targets will be treated as order-only dependencies,
-  meaning that they will be forced up to date before compiling or
-  any files in the target, but changes in the inputs will not
-  necessarily force the target to compile. This is because it is
-  expected that the compiler will report the precise list of input
-  dependencies required to recompile each file once the initial build
-  is done.
+  Inputs for binary targets will be treated as implicit dependencies,
+  meaning that changes in any of the inputs will force all sources in
+  the target to be recompiled. If an input only applies to a subset of
+  source files, you may want to split those into a separate target to
+  avoid unnecessary recompiles.
 
 ```
 
 ### **Example**
 
 ```
   action("myscript") {
     script = "domything.py"
     inputs = [ "input.data" ]
   }
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 **  \--root**: Explicitly specify source root.
 **  \--runtime-deps-list-file**: Save runtime dependencies for targets in file.
 **  \--script-executable**: Set the executable used to execute scripts.
 **  \--threads**: Specify number of worker threads.
 **  \--time**: Outputs a summary of how long everything took.
 **  \--tracelog**: Writes a Chrome-compatible trace log to the given file.
 **  -v**: Verbose logging.
 **  \--version**: Prints the GN version number and exits.
 
 ```