Add per board customization, clean up private autotests.

Add per board customization, clean up private autotests.

BUG=1583
TEST=actually builds

Change-Id: I6510f30faf3f3c2e88b4ea9c63985c09086e1a5d

Review URL: http://codereview.chromium.org/4482001
(cherry picked from commit afba119639afe0fb8206e58ead091f2efd114192)

Allow branch customization for factory

BUG=1583
TEST=removes superfluous files

Change-Id: I576fc0dd811f9c1ed6299a539e0e8a014b37bdc8

Review URL: http://codereview.chromium.org/4376001
(cherry picked from commit 08fdc9da26456c286254c250366bdfc738f8ed38)

No pagecycler for factory image

BUG=1583
TEST="build, no pagecycler in factory."

Change-Id: I43d23de5d518634697e17a32bcd94a43aad46aba

Review URL: http://codereview.chromium.org/4342002
(cherry picked from commit f3e98785f3ed3f4e87e4287ee3ec45e2fc737c89)

[Nick Sanders, 2010-11-17 03:26:32]

cherry pick from 102.B

[Hung-Te, 2010-11-17 03:50:21]

http://codereview.chromium.org/5091002/diff/1/mod_for_factory_scripts/600cust...
File mod_for_factory_scripts/600customizeRelease (right):

http://codereview.chromium.org/5091002/diff/1/mod_for_factory_scripts/600cust...
mod_for_factory_scripts/600customizeRelease:9: pushd ${TEST_DIR} 1> /dev/null
better to be quoted as "${TEST_DIR}". And I think we don't need "1>" for stdout
- simply ">" is enough. Also there should not be space between redirection
symbol and destination file according to shell script coding style guide. 

In other words, this can be
pushd "${TEST_DIR}" >/dev/null

P.S: should we abort if TEST_DIR does not exist?

http://codereview.chromium.org/5091002/diff/1/mod_for_factory_scripts/600cust...
mod_for_factory_scripts/600customizeRelease:16: "./${CUSTOMIZE}"
pushd/popd is sometimes buggy, and is bash-only. Since the only place that needs
changing directory is one line, I'd more prefer a sub-command like
 ( cd "${TEST_DIR}" && "./${CUSTOMIZE}" )
and prefix $TEST_DIR to all reference to $CUSTOMIZE and customize_* in this
script.

However, since current code is working fine, I'm OK if we don't change this
part.

http://codereview.chromium.org/5091002/diff/1/mod_for_factory_scripts/600cust...
mod_for_factory_scripts/600customizeRelease:22: popd 1> /dev/null
popd >/dev/null

[Nick Sanders, 2010-11-17 03:59:14]

http://codereview.chromium.org/5091002/diff/1/mod_for_factory_scripts/600cust...
File mod_for_factory_scripts/600customizeRelease (right):

http://codereview.chromium.org/5091002/diff/1/mod_for_factory_scripts/600cust...
mod_for_factory_scripts/600customizeRelease:9: pushd ${TEST_DIR} 1> /dev/null
This is to maintain consistency with other mod_for factory. I'd prefer to cherry
pick this directly, to get TOT matched to the the factory branch, and address
style issues in a separate CL.

[Nick Sanders, 2010-11-17 04:00:25]

> and address style issues in a separate CL.
In which case we should correct all instance in mod_for_factory, rather than
only this one.

[Hung-Te, 2010-11-17 06:25:25]

LGTM for this to be a direct cherry-pick and for coding style consistency