envsetup.sh: add missing dquotes

Change-Id: Ic86a5dd36b0f32cd7dc4d2f9c187566398796ed6
build: get rid of the sparse expand stuff

* i don't see a reason why we are doing this because we never deal
with flashing system img rawly
* This will put useless write on ssd..
* we don't have space on ssd

Change-Id: Icd53d161b8515f5eca238b98ad68515d69caa34f
repopick: gracefully handle empty/non-JSON server responses

Change-Id: Idbabdbfb4a910de0ad405f02b2a84cf2bc9ef3dc
repopick: remove the superfluous information from date

  * '2011-11-17 06:54:52.000000000' -> '2011-11-17 06:54:52'

Change-Id: I73d37c9aba13d4be6b4d2d2fc0f2f83971a3e77b
repopick: let's be nice to our servers :)

* Prefer fetching changes from GitHub, and if that fails,
  silently fall-back to Gerrit.

Change-Id: Ibf68d4b69a7e8dbee2adb8f7f4250340b8be629c