* upgraded bash_completion to v1.3

* upgraded to subversion bash completion script shipped with subversion 1.6.17
* added git bash completion script shipped with git 1.7.5.4
* readded bash completion to the image

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42257 a95241bf-73f2-0310-859d-f6bbb57e9c96

data/etc/profile.d/bash_completion.sh

@@ -0,0 +1,12 @@
+# Check for interactive bash and that we haven't already been sourced.
+[ -z "$BASH_VERSION" -o -z "$PS1" -o -n "$BASH_COMPLETION" ] && return
+
+# Check for recent enough version of bash.
+bash=${BASH_VERSION%.*}; bmajor=${bash%.*}; bminor=${bash#*.}
+if [ $bmajor -gt 3 ] || [ $bmajor -eq 3 -a $bminor -ge 2 ]; then
+    if shopt -q progcomp && [ -r /boot/common/etc/bash_completion ]; then
+        # Source completion code.
+        . /boot/common/etc/bash_completion
+    fi
+fi
+unset bash bmajor bminor