Get rid of SRC/stamp-* files
Get rid of SRC/stamp-* files

SRC/stamp-* files were used to keep the timespamp of the sources checkout. BUILD/* targets had these as prerequisities.

In fact this does not work:
- SRC/stamp-* files do not track source files changes
- BUILD/* targets often require full rebuild (configure+make), and this fact can be only realized by the developer

Common practice we have now is to either rebuild one component by issuing "make" right in the BUILD/* directory or to clean everything and make the full rebuild.
Buildbots using Makefile do full clean and rebuild as well.

This change simply removes generation of SRC/stamp-* files, and changes corresponding prerequisities to order only SRC/* directories.
It also removes several obsolete targets.
 

Review URL: http://codereview.chromium.org/6597069

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@4424 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

sbc100/native_client,sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,nacl-webkit/native_client,nacl-webkit/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,nacl-webkit/native_client