buildhistory.bbclass: Rename build-id to build-id.txt and add more info

:Release Notes:
Include complete build header as it's shown by bitbake

:Detailed Notes:

:Testing Performed:
Only build tested.

:QA Notes:

:Issues Addressed:
[ES-226] Add "Build Configuration" to build-id.txt

Open-webOS-DCO-1.0-Signed-off-by: Martin Jansa <martin.jansa@lge.com>
Change-Id: I683d41f51228a6317eb7e2caafedd87422ba96cf
Reviewed-on: https://g2g.palm.com/3405
Reviewed-by: Martin Jansa <Martin.Jansa@lge.com>
Tested-by: Martin Jansa <Martin.Jansa@lge.com>
Reviewed-by: Yegor Minin <yminin@luxoft.com>
Reviewed-by: Build Verification
Reviewed-by: Susan Montooth <susan.montooth@lge.com>