fix typos in README.rst.

slapos.extension.strip_/README.rst

@@ -32,17 +32,17 @@ Supported Options
 ``file-binary``
 
   Path to ``file`` program. Defaults to 'file' which should work on
-  any system that has the make program available in the system
+  any system that has the file program available in the system
   ``PATH``.
 
 ``find-binary``
 
   Path to ``find`` program. Defaults to 'find' which should work on
-  any system that has the make program available in the system
+  any system that has the find program available in the system
   ``PATH``.
 
 ``strip-binary``
 
   Path to ``strip`` program. Defaults to 'strip' which should work on
-  any system that has the make program available in the system
+  any system that has the strip program available in the system
   ``PATH``.