Untangle and clean up the logging code

It was a mess before because of a combination of having code split out
for cRIO vs Linux and cruft.

Change-Id: Id282e1a7f7988be0441c669a573a5d022ed41fb9
diff --git a/aos/linux_code/starter/BUILD b/aos/linux_code/starter/BUILD
index 5e3ac38..ec6ce7f 100644
--- a/aos/linux_code/starter/BUILD
+++ b/aos/linux_code/starter/BUILD
@@ -17,6 +17,7 @@
     '//aos/linux_code:init',
     '//third_party/libevent',
     '//aos/common/logging',
+    '//aos/common/logging:implementations',
     '//aos/common:once',
     '//aos/common:time',
     '//aos/common/libc:aos_strsignal',