Fixes a minor typo, in a comment, in the gdbarch-components.py script.
There should be no user visible changes after this commit.
#
# A gdbarch is zero-initialized. Then, if a field has a pre-default,
# the field is set to that value. After initialization is complete
-# (that is, after the tdep code has a change to change the settings),
+# (that is, after the tdep code has a chance to change the settings),
# the post-initialization step is done.
#
# There is a generic algorithm to generate a "validation function" for