Everybody is using the C99's integer types. Everybody except Microsoft,
which in turns means everybody is including their own definitions of C99
integer types for MSVC, causing duplicate definitions when linking two
projects. This is the case of building Gallium and LLVM with MSVC.

Shipping alternative stdint.h and stdbool.h headers for MSVC allows us
to share a single definition. It also removes clutter from the Gallium
headers.

Cell driver's SConscript never got written, and it is not trivial one to
write, so don't accept cell in the driver option to avoid confusion.

This is a substantial reorganization, This particular commit enables:
- building the progs for unices platforms
- glew is now built as a shared library (it is the default, and it is
inconvenient and pointless to shift away from that default)
- all progs get built by default

This fixes MinGW cross compilation build, recently broken due to the use
of convenience libraries in the GLSL preprocessor.

This is quite messy. GLSL code has to be built twice: one for the
host OS, another for the target OS.

But there are some missing symbols, "nm -u i965_dri.so"
[SNIP]
                 U brw_surface_bo
                 U brw_surface_pitch
                 U brw_texture_blanket_winsys_buffer
                 U brw_texture_get_winsys_buffer
                 U brw_update_dirty_counts
[SNIP]

	None of the other driver have a silly sufix,
	so just drop it. Nothing new added in this commit
	or any other commit but this is better marketing.

The driver never work with real hardware and has
bitrotted for quite some time now, might as well
drop it. If somebody wants to look at it just use git.

scons ... statetrackers=xorg

	This driver does no transformation of the gallium calls
	going to the real driver, like the identity matrix. It is
	intended to be the basis for transforming and/or debug
	drivers like trace and rbug.

	Authors of this patch are:
		Michal Krol, orignal heavy lifting.
		José Fonesca, object wrapping code stolen from trace.
		Jakob Bornecrantz, put it all toghether and renamed a stuff.

They don't seem necessary here, but they shouldn't hurt either...

	Please read previous commit for more info.

Added command line option for Scons to select which version of MSVS to use.   Versions 7.1, 8.0 and 9.0 are allowed.   Usage is scons MSVS_VERSION=8.0.

Only pipe_screen calls traced, and only linux supported, for now.

Still under development. Just barely works.

More logic can be shared between public and private branches this way.

Note that int32_t is typedef'd both in p_compiler.h and eglplatform.h

Conditional build of the winsys based on the platform.

But only actually build it on some. This results in a better default
scons experience.

Actually, more like get rid of all our hacks when compiling for
user-land windows.

Only MSVC is supported atm though.