doc: Add notes on how to install patman and binman

These can be installed with 'pip' now. Add the details for those who are
interested.

Signed-off-by: Simon Glass <sjg@chromium.org>

tools/binman/binman.rst

@@ -95,6 +95,19 @@ Binman uses the following terms:
 - binary - an input binary that goes into the image
 
 
+Installation
+------------
+
+You can install binman using::
+
+   pip install binary-manager
+
+The name is chosen since binman conflicts with an existing package.
+
+If you are using binman within the U-Boot tree, it may be easiest to add a
+symlink from your local `~/.bin` directory to `/path/to/tools/binman/binman`.
+
+
 Relationship to FIT
 -------------------
 

tools/patman/patman.rst

@@ -41,6 +41,18 @@ In Linux and U-Boot this will also call get_maintainer.pl on each of your
 patches automatically (unless you use -m to disable this).
 
 
+Installation
+------------
+
+You can install patman using::
+
+   pip install patch-manager
+
+The name is chosen since patman conflicts with an existing package.
+
+If you are using patman within the U-Boot tree, it may be easiest to add a
+symlink from your local `~/.bin` directory to `/path/to/tools/patman/patman`.
+
 How to use this tool
 --------------------