commit 7ebc00199cfbd9f9671f278ae499afafd2aa41d3
author Jae Shin <jaeshin@google.com> Thu Aug 09 12:57:20 2018 +0900
committer Justin Yun <justinyun@google.com> Tue Oct 30 12:05:24 2018 +0900
tree d7c37e7b67576b0a40a913d4c940e4824c3a3f53
parent 66118192e209f4bd3105889a63ff722f28ea0c69

Check first if system_dir and device_dir exists

Change the order of variable checking so it is clear whether
the system_dir or device_dir does not exist or a specific file
in the *_dir does not exist.

Test: build_mixed system_dir device_dir dist_dir
Merged-In: I0d61ea11c3bd22ef12eccbb46b8f665414188307
Change-Id: I0d61ea11c3bd22ef12eccbb46b8f665414188307
(cherry picked from commit 52edf8fb4f5eaa8f6c6c13a1a87a34311ccb76ed)
(cherry picked from commit f418b9b9e55fc1d4e658a2942ed7bb6ce1972836)