add download and mount scripts

.gitignore

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+image/

.gitmodules

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+[submodule "cerbero"]
+	path = cerbero
+	url = https://gitlab.freedesktop.org/gstreamer/cerbero.git
+	branch = 1.14

.travis.yml

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+sudo: required
+
+language: bash
+
+before_install:
+  - sudo apt-get update
+
+script:
+  - download.sh
+  - mount.sh

download.sh

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+#!/bin/bash
+# Downloads latest raspbian lite image
+
+ZIP=raspbian_lite.zip
+IMG=raspbian_lite.img
+URL=https://downloads.raspberrypi.org/raspbian_lite_latest
+
+echo "Downloading latest raspbian lite release"
+mkdir -p image
+wget $URL -O image/${ZIP}
+
+echo "Extracting image"
+unzip image/${ZIP} -d image/
+
+FILE=`zipinfo -1 image/${ZIP}`
+mv image/${FILE} image/${IMG}

mount.sh

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+#!/bin/bash 
+# Mounts raspbian image inside cerbero build system
+
+IMG='raspbian_lite.img'
+MNT='cerbero/config/raspbian_sysroot'
+
+# Attach loopback device
+LOOP_DEV=`losetup -f --show image/${IMG}`
+echo "Attached base loopback at: $LOOP_DEV"
+
+# Fetch and parse partition info
+LOOP=`basename ${LOOP_DEV}`
+SECTOR_SIZE=`cat /sys/block/${LOOP}/queue/hw_sector_size`
+ROOT_START=`fdisk -l $LOOP_DEV | grep ${LOOP_DEV}p2 | awk '{print $2}'`
+echo "Located root partition at sector $ROOT_START (sector size: ${SECTOR_SIZE}B)"
+
+mkdir -p $MNT
+mount image/${IMG} -o loop,offset=$(($ROOT_START*$SECTOR_SIZE)),rw $MNT
+if [[ $? != 0 ]]; then
+    echo "Error mounting root partition"
+else
+    echo "Mounted root partition to $MNT"
+fi
+
+losetup -d $LOOP_DEV
+echo "Closed loopback $LOOP_DEV"