unix: Update .gitignore; now ignores coverage build.

181adc6a · Damien George · c36635c1 · 181adc6a
Commit 181adc6a authored Jun 03, 2015 by Damien George
--- a/unix/.gitignore
+++ b/unix/.gitignore
 build
 build-fast
 build-minimal
+build-coverage
 micropython
 micropython_fast
 micropython_minimal
+micropython_coverage
 *.py
-micropython-upip-*