Only create the state dir if asked for a restartable build:
- introduce the config dir, where components can store their config files
- move the munged uClibc config file to the config dir
- now, the state dir really is an indication that a build can be restarted

Thanks to Groleo Marius <groleo@gmail.com> for spotting the inconsistency
of the state dir usage, and suggesting this change.

/trunk/scripts/build/libc/uClibc.sh | 6 3 3 0 +++---
/trunk/scripts/crosstool-NG.sh.in | 9 7 2 0 +++++++--
/trunk/scripts/functions | 15 12 3 0 ++++++++++++---
3 files changed, 22 insertions(+), 8 deletions(-)

 This is the README for crosstool-NG

 To get you started, just enter:

   ./configure --help

 You can find a (terse and WIP) documentation in docs/overview.txt.

 You can also point your browser to

   http://ymorin.is-a-geek.org/dokuwiki/projects/crosstool

 If you need to send a bug report or a patch, please send a mail with subject

 prefixed with "[CT_NG]" with the following destinations:

     TO: yann.morin.1998 (at) anciens.enib.fr

     CC: crossgcc (at) sourceware.org

 The people that helped are listed in docs/CREDITS. Many thanks to them! :-)

 The list of known issues is listed in docs/known-issues.txt.

 Aloha!