[Mesa-dev] Consolidate the source files to Makefile.sources v2

[Emil Velikov]

This is a first part of my planned automake rework - moving source files
list(s) into Makefile.sources.

* The first four patches are rather trivial cleanups (first one being an
update of Johannes Obermayr's patch from his ).


* The next 24 provides Makefile.sources for the following
 gallium/drivers/
 gallium/state_trackers/
 gallium/winsys/!sw/

* With the final patch nuking an obsolete .gitignore

Overall the diffstat looks quite nice :P
 91 files changed, 511 insertions(+), 685 deletions(-)


Review and comments welcome :)

The series is available in the makefile.sources-v3 branch over at
https://github.com/evelikov/Mesa/

I'm bit short of commit access so would be great of someone can commit the
patches that look reasonable.

Cheers
Emil