meta-qti-bsp: Make '#' as default text in LE shell

Change-Id: I8bd6bc9840865635b135c334503dd744c6efd4c0

meta-qti-customizations/core/recipes-core/base-files/base-files_3.0.14.bbappend

@@ -56,3 +56,9 @@ do_install:prepend:trustedvm (){
    sed -e '/-z "\$PS1"/d' -i ${WORKDIR}/profile
    sed -i "/# Set the prompt for bash/a [ -z \"\$PS1\" ] || PS1='~ # '" ${WORKDIR}/profile
 }
+
+do_install:prepend:trustedvm-v4 (){
+   sed -e '/-z "\$PS1"/d' -i ${WORKDIR}/profile
+   sed -i "/# Set the prompt for bash/a [ -z \"\$PS1\" ] || PS1='~ # '" ${WORKDIR}/profile
+   echo 'cd /' >> ${WORKDIR}/profile
+}