Added debug to build scripts

.travis/docker.sh

 #!/bin/bash
+set -x
 set -euvo pipefail
 IFS=$'\n\t'
 

.travis/snap.sh

 #!/bin/bash
+set -x
+set -euvo pipefail
+IFS=$'\n\t'
 
 if [ -z "$SNAPCRAFT_SECRET" ]; then
     exit 0

example-build.sh

 #!/bin/bash
 set -x
 set -euvo pipefail
+IFS=$'\n\t'
 
 export METEOR_SETTINGS=$(cat settings.json)
 export NODE_ENV=production

install.sh

 #!/bin/bash
 set -x
 set -euvo pipefail
+IFS=$'\n\t'
 
 ROOTPATH=/var/www/rocket.chat
 PM2FILE=pm2.json

publish_packages.sh

+#!/bin/bash
+set -x
+set -euvo pipefail
+IFS=$'\n\t'
+
 for d in packages/* ; do
   echo "$d"
   cd $d
   meteor publish
   cd ../../
-done
\ No newline at end of file
+done