[Parser] Fix-it for declaration attributes being applied to parameter types (SR-215)

[SquaredTiki]

As described in SR-215, previously the fix-it was suggesting that declaration attributes applied to parameter types be moved to before the function func declaration itself.

This pull request fixes this so that it is instead moved to before the parameter name.

[gribozavr]

We usually don't leave references to bug numbers in C++ sources.

[gribozavr]

Please also add tests. test/NameBinding/import-specific-fixits.swift shows how to test fixits.

[SquaredTiki]

@gribozavr Thanks for the comments. I've added a test and removed the reference to the bug number.

[gribozavr]

@SquaredTiki Thank you! Sorry for the delayed response, but would you mind rebasing and resolving conflicts with master?

[SquaredTiki]

@gribozavr No worries! I've rebased and resolved conflicts.

[gribozavr]

Should it say DAK_Count?

[SquaredTiki]

Quite right, let me fix that now.

[gribozavr]

@SquaredTiki Sorry, this PR caused test failures, so I reverted it.

swift/test/attr/attr_noescape.swift:5:131: error: expected fix-it not seen; actual fix-its: {{1-1=@noescape }} {{23-33=}}
func appliedToType(g: @noescape ()->Void) { g() }  // expected-error {{attribute can only be applied to declarations, not types}} {{20-20=@noescape }} {{23-33=}}
                                                                                                                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                                                                                                                  {{1-1=@noescape }} {{23-33=}}

swift/test/attr/attributes.swift:57:120: error: expected fix-it not seen; actual fix-its: {{11-11=@_transparent }} {{14-28=}}
func zoom(x: @_transparent () -> ()) { } // expected-error{{attribute can only be applied to declarations, not types}} {{1-1=@_transparent }} {{14-28=}}
                                                                                                                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                                                                                                       {{11-11=@_transparent }} {{14-28=}}

[gribozavr]

@SquaredTiki Please run build-script -RT, fix the failures, and re-submit the PR.