Added files abstraction to the HAL.

git-svn-id: svn+ssh://svn.code.sf.net/p/chibios/svn/trunk@7542 35acf78f-673a-0410-8e92-d51de3d6d3f4
git-svn-id: svn+ssh://svn.code.sf.net/p/chibios/svn/trunk@7543 35acf78f-673a-0410-8e92-d51de3d6d3f4
git-svn-id: svn+ssh://svn.code.sf.net/p/chibios/svn/trunk@7544 35acf78f-673a-0410-8e92-d51de3d6d3f4
Added SZ execution in makefile verbose mode.

git-svn-id: svn+ssh://svn.code.sf.net/p/chibios/svn/trunk@7545 35acf78f-673a-0410-8e92-d51de3d6d3f4
Fixed bug #549.

git-svn-id: svn+ssh://svn.code.sf.net/p/chibios/svn/trunk@7546 35acf78f-673a-0410-8e92-d51de3d6d3f4
Fixed bug #550.

git-svn-id: svn+ssh://svn.code.sf.net/p/chibios/svn/trunk@7548 35acf78f-673a-0410-8e92-d51de3d6d3f4
typo

git-svn-id: svn+ssh://svn.code.sf.net/p/chibios/svn/trunk@7549 35acf78f-673a-0410-8e92-d51de3d6d3f4
Removed assertion for repeated tickless timer stop. Improved comments in virtual timers.

git-svn-id: svn+ssh://svn.code.sf.net/p/chibios/svn/trunk@7550 35acf78f-673a-0410-8e92-d51de3d6d3f4