base-files: make bash-completion work

Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>

appends/oe-core/base-files/profile

@@ -29,6 +29,10 @@ if command -v resize >/dev/null && command -v tty >/dev/null; then
 	esac
 fi
 
+if [ -f /etc/bash_completion ]; then
+    . /etc/bash_completion
+fi
+
 export PATH PS1 OPIEDIR QPEDIR QTDIR EDITOR TERM PROMPT_COMMAND
 
 umask 022