* tie defaults to releases
this change makes it so that by default, the flag defaults are
chosen based on whether the build was built as a release build or
an ordinary build. release builds by default get release defaults,
whereas ordinary builds by default get dev defaults.
any binary can have its defaults changed by specifying
--defaults=dev
or
--defaults=release
Change-Id: I6d216aa345d211c69ad913159d492fac77b12c64
* make release defaults more clear
this change extends cfgstruct structs to support either
a 'default' tag, or a pair of 'devDefault' and 'releaseDefault'
tags, but not both, for added clarity
Change-Id: Ia098be1fa84b932fdfe90a4a4d027ffb95e249c6
* clarify cfgstruct.DefaultsFlag
Change-Id: I55f2ff9080ebbc0ce83abf956e085242a92f883e
