Remove "lib" and "lib64" from the mbed-OS .gitignore file: they do not seem to be required and lib is used as a directory name in a recent (u-blox) mbedOS target submission, so ignoring the files under that directory becomes a problem.

Author: RobMeades

.gitignore

@@ -34,8 +34,6 @@ var
 sdist
 develop-eggs
 .installed.cfg
-lib
-lib64
 
 # Installer logs
 pip-log.txt