Enable dev build with the latest repo

Enable dev build with the latest repo

This patch is to support initial build.

- Fix build issue caused by the latest platform ninja
- Provide build option --tizen_5.5 for upgradable web engine
- Refactor common.sh and gn_chromiumefl.sh
- Remove dependency of openssl, print, and pulse
- Update gbs.conf with the latest
- Use costomized job number for ninja build
- Use platform gcc version in build time
- Use system icu for public profile

Change-Id: I2fdb92e074fac3dfec406c159c6184cf7136f59f
Signed-off-by: Youngsoo Choi <kenshin.choi@samsung.com>