Patch for spelling errors

[Philip Blundell]

>I've installed as obvious the following patch to fix some spelling errors
>where "depreciated" was used but "deprecated" was meant.

>-*** The Thumb targets have been depreciated.  The equivalent
>+*** The Thumb targets have been deprecated.  The equivalent
> *** ARM based toolchain can now generated Thumb instructions

While you're at it, you might fix that `generated' too.

p.