ADB Logcat colored output.

This patch adds a new '-C' option to logcat so that the output is
colored with colors similar to the ones in DDMS.
Simply type "adb logcat -C" to use it.
Works well with bash in gnome-terminal.

Change-Id: Ie72199ecca0e04f2082c993f5763646bb09da61ea
Revert "init: Implement exec support"

This reverts commit 73542d5590c6b04322e580865f4212052565182d.
Add support for exec command in init scripts.

Change-Id: Iee523fd75410718f0bd090f5fdcba50825a698c4
init: Add support for properties expansion in exec command

Add Android properties expansion to 'exec' arguments.
E.g.  exec /system/bin/log ${sys.usb.config}

CRs-Fixed: 390942
Change-Id: Ie520396d951e578bd9f591734a45d2f460b8f51d
Set ANDROID_PROPERTY_WORKSPACE in exec.

Change-Id: Ib827bf14b4463ca6277b79256bcc4cd70f63fc31