[patch/mi/doc] Make tuple/list official in documentation.

[Andrew Cagney <ac131313@cygnus.com>]

Hello,

The attatched patch merges the section ``GDB/MI Draft Changes to Output 
Syntax'' into the section ``Output Syntax'' making the tuple/list output 
official.

Follow on patches will update the relevant commands but only as I also 
fix each bit of the corresponding code.

One technical note on the syntax.  It still allows output of the form:

	foo=[a="val",a="val"]

even though it is argueable as wrong.  This is a pragmatic decision. 
People parsing a list should expect but ignore ``a=''.  I'll see about 
eliminating it in a later round of updates.

I'll also document this as a querk where it occures in the MI output.

Hmm, perhaps I should just document this in the output syntax section.

	Andrew