[Ada] doc updates

[Duncan Sands]

+Note that a relocatable DLL and stripped using the @code{strip}
+binutils tool will not be relocatable anymore. To build a DLL without
+debug information pass @code{-largs -s} to @code{gnatdll}. This
+restriction does not apply to a DLL built using a Library Project.

Extraneous "and" in the first line.

+This pragma can occur immediately following a subprogram
+declaration in which  indicates that the associated function or procedure
 is considered obsolescent and should not be used. Typically this is

"in which indicates" doesn't parse.

+in the predefined library where subprograms or packages
+have become definedas obsolescent in Ada 2005
+(e.g. in Ada.Characters.Handling), but may be used anywhere.

Missing space: "definedas"

Duncan.