tools: Upgrade upip to 0.6.3.

Updated for _os -> uos builtin module rename.

tools: Upgrade upip to 0.6.3.
bb7f5b55 · Paul Sokolovsky · a6eff059 · a6eff059 · bb7f5b55
Commit bb7f5b55 authored Dec 11, 2015 by Paul Sokolovsky
--- a/tools/micropython-upip-0.6.2.tar.gz
+++ b/tools/micropython-upip-0.6.2.tar.gz
--- a/tools/micropython-upip-0.6.3.tar.gz
+++ b/tools/micropython-upip-0.6.3.tar.gz