Move minidump_extension_linux.h contents into minidump_format.h

I think having these in a separate file is just confusing, especially since it
defines stream types, so it makes avoiding overlap in the numbering harder.

[Lei Zhang (chromium)]

http://breakpad.appspot.com/415002/diff/1/src/google_breakpad/common/minidump...
File src/google_breakpad/common/minidump_format.h (right):

http://breakpad.appspot.com/415002/diff/1/src/google_breakpad/common/minidump...
src/google_breakpad/common/minidump_format.h:338: MD_LINUX_CPU_INFO             
= 0x47670003,  /* /proc/cpuinfo      */
Drive by: MD_LINUX_CPU_INFO has the same value as MD_CUSTOM_DATA_STREAM.

[Ted Mielczarek]

On Thu, Jul 12, 2012 at 9:20 PM,  <thestig@chromium.org> wrote:
>
>
http://breakpad.appspot.com/415002/diff/1/src/google_breakpad/common/minidump...
> File src/google_breakpad/common/minidump_format.h (right):
>
>
http://breakpad.appspot.com/415002/diff/1/src/google_breakpad/common/minidump...
> src/google_breakpad/common/minidump_format.h:338: MD_LINUX_CPU_INFO
>         = 0x47670003,  /* /proc/cpuinfo      */
> Drive by: MD_LINUX_CPU_INFO has the same value as MD_CUSTOM_DATA_STREAM.

Yeah, I pointed that out after-the-fact in the review for that patch. :-/

[Ted Mielczarek]

So yeah, we should really take this patch to avoid the duplicate stream
numbering. Mark: it's a pretty trivial patch otherwise.

[Mark Mentovai]

LGTM as long as nobody’s started depending on a value that has changed. They
probably haven’t been depending on anything since this stuff is brand-new.

[Ted Mielczarek]

On Fri, Jul 20, 2012 at 8:34 AM,  <mark@chromium.org> wrote:
> LGTM as long as nobody’s started depending on a value that has changed.
> They probably haven’t been depending on anything since this stuff is
> brand-new.

Yeah, cdn said it wasn't a problem:
http://breakpad.appspot.com/408002/#msg18