Patches for Rpmbuildstage:bb.

Patches for Rpmbuildstage:bb.

If "RpmbuildStage:bb" is in project config, *.src.rpm are not generated.
However, for our RPM comparison optimization for prerelease projects,
it is required to compare RPMs in prerelease projects and RPMs in normal projects.

In this case, we have to do followings:
1. Exclude *.src.rpm to check the number of subpackages
2. Do not check the existence of source rpm
3. Do not compare rpmlint.log
  The last line of rpmlint.log can be different because the number of subpackages are different.

Change-Id: Ie0b02e45ad46cc23737a5fec836f42118f6e6868
Signed-off-by: Junghyun Kim <jh0822.kim@samsung.com>