Added the ability to get synthetic child values from SBValue objects that

represent pointers and arrays by adding an extra parameter to the 

SBValue
SBValue::GetChildAtIndex (uint32_t idx, 
                         DynamicValueType use_dynamic, 
                         bool can_create_synthetic);

The new "can_create_synthetic" will allow you to create child values that
aren't actually a part of the original type. So if you code like:

int *foo_ptr = ...

And you have a SBValue that contains the value for "foo_ptr":

SBValue foo_value = ...

You can now get the "foo_ptr[12]" item by doing this:

v = foo_value.GetChiltAtIndex (12, lldb.eNoDynamicValues, True);

Normall the "foo_value" would only have one child value (an integer), but
we can create "synthetic" child values by treating the pointer as an array.

Likewise if you have code like:

int array[2];

array_value = ....

v = array_value.GetChiltAtIndex (0);     // Success, v will be valid
v = array_value.GetChiltAtIndex (1);     // Success, v will be valid
v = array_value.GetChiltAtIndex (2);     // Fail, v won't be valid, "2" is not a valid zero based index in "array"

But if you use the ability to create synthetic children:

v = array_value.GetChiltAtIndex (0, lldb.eNoDynamicValues, True);     // Success, v will be valid
v = array_value.GetChiltAtIndex (1, lldb.eNoDynamicValues, True);     // Success, v will be valid
v = array_value.GetChiltAtIndex (2, lldb.eNoDynamicValues, True);     // Success, v will be valid

llvm-svn: 135292