Don't print directories as we descend into them.

Fix glibc and uClibc downloading and extracting.
Although we no longer need the kernel config file, we now need to specify the kernel source directory when installing headers.
Re-order components downloading to match build order.
Fix the saveSample.sh script in case the referenced files are the same as the destination files.

Merge the save-sample branch to trunk:
- reorder most of the environment setup,
- geting, extracting and patching are now components' sub-actions,
- save the current config as a sample to be used as a pre-configured target.