[Mac/iOS/GN] Document the new rules for create_bundle and runtime_deps.

tools/gn/docs/reference.md

Index: tools/gn/docs/reference.md
diff --git a/tools/gn/docs/reference.md b/tools/gn/docs/reference.md
index c596b27f25c6ca48c98343cd6191f6394aa7985d..59c54dcb099f8f411dd593293d009f03de94db31 100644
--- a/tools/gn/docs/reference.md
+++ b/tools/gn/docs/reference.md
@@ -736,7 +736,7 @@
   --root-target=<target_name>
       Name of the root target for which the QtCreator project will be
       generated to contain files of it and its dependencies. If unset, 
-      the whole build graph will be omitted.
+      the whole build graph will be emitted.
 
 
 ```
@@ -1418,6 +1418,12 @@
   generate iOS/OS X bundle. In cross-platform projects, it is advised to
   put it behind iOS/Mac conditionals.
 
+  If a create_bundle is specified as a data_deps for another target, the
+  bundle is considered a leaf, and its public and private dependencies
+  will not contribute to any data or data_deps. Required runtime
+  dependencies should be placed in the bundle. A create_bundle can
+  declare its own explicit data and data_deps, however.
+
 ```
 
 ### **Variables**
@@ -2558,6 +2564,7 @@
 
 ### **Variables**
 
+### **complete_static_lib**
 ```
   Flags: cflags, cflags_c, cflags_cc, cflags_objc, cflags_objcc,
          asmflags, defines, include_dirs, ldflags, lib_dirs, libs,
@@ -4397,6 +4404,9 @@
   However, no verification is done on these so GN doesn't enforce this.
   The paths are just rebased and passed along when requested.
 
+  Note: On iOS and OS X, create_bundle targets will not be recursed
+  into when gathering data. See "gn help create_bundle" for details.
+
   See "gn help runtime_deps" for how these are used.
 
 
@@ -4413,6 +4423,10 @@
   This is normally used for things like plugins or helper programs that
   a target needs at runtime.
 
+  Note: On iOS and OS X, create_bundle targets will not be recursed
+  into when gathering data_deps. See "gn help create_bundle" for
+  details.
+
   See also "gn help deps" and "gn help data".
 
 ```