* gdb.mi/mi-stack.c: New file, based on gdb.mi/basics.c.
* gdb.mi/mi-var-child.c: New file, based on gdb.mi/var-cmd.c.
* gdb.mi/mi-stack.exp: Update to use mi-stack.c as a source file.
* gdb.mi/mi-var-child.exp: Update to use mi-var-child.c as a source
file.
(do_children_tests): Assign values to the extra elements.
* gdb.mi/mi-var-child.exp: Adapt tests for extra elements and use
them for tests for "-var-update --no-values" and
"-var-update --all-values".
Add test for "-var-list-children --simple-values".
* gdb.mi/basics.c (callee4): Add integer array D[3]...
* gdb.mi/mi-stack.exp (test_stack_locals_listing): ...to test
"-stack-list-locals --simple-values" Improve doc strings and
comments.
* mi-disassemble.exp: Don't assume numbers for the offset
values. They can be different depending on the architecture.
* mi-watch.exp (test_watchpoint_triggering): In same cases the
type can be 'hw wathcpoint' not just 'watchpoint'. Adjust for that.
* basics.c (callee4): Make the function return something,
otherwise the return value is undefined.
