FIX: incorrect shebang in all.sh

FIX: incorrect shebang in all.sh

The current vconf-internal-keys shows the following error
during installation:

[04/06 08:31:36 UTC] Installing: ecore                +++++++++++++++++++++++++++++      [210/243]
[04/06 08:31:36 UTC] Installing: fsck-msdos           +++++++++++++++++++++++++++++      [211/243]
[04/06 08:31:36 UTC] Installing: vconf-internal-keys  +++++++++++++++++++++++++++++      [212/243]
[04/06 08:33:02 UTC] /opt/usr/all.sh: line 1: !/bin/bash: No such file or directory
Create: 'system' 'db/private/email-service/noti_vip_vibration_status' '0' Priv 'http://tizen.org/privilege/internal/default/platform' 'http://tizen.org/privilege/internal/default/platform': File exists

[04/06 08:33:02 UTC] Installing: tlm-config-common-si +++++++++++++++++++++++++++++      [213/243]
[04/06 08:33:02 UTC] Installing: system-plugin-rpi3   +++++++++++++++++++++++++++++      [214/243]

Change-Id: Iaf3d77205c09409e7f7462143835d4e56c066544
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>