Merge pull request #916 from practicalswift/mark-ide-crashers-as-fixed

[tests] Mark three IDE crashers as fixed

Author: nkcsgexi

validation-test/IDE/crashers/020-swift-typechecker-validategenericfuncsignature.swift

@@ -0,0 +1,2 @@
+// RUN: not %target-swift-ide-test -code-completion -code-completion-token=A -source-filename=%s
+protocol a{struct B<e{let a{protocol a{func a<T:s#^A^#

validation-test/IDE/crashers/028-swift-typechecker-validategenericsignature.swift

@@ -0,0 +1,2 @@
+// RUN: not %target-swift-ide-test -code-completion -code-completion-token=A -source-filename=%s
+protocol c{struct Q<g{var d{{class B<T:e#^A^#

validation-test/IDE/crashers/041-swift-archetypebuilder-getgenericsignature.swift

@@ -0,0 +1,2 @@
+// RUN: not %target-swift-ide-test -code-completion -code-completion-token=A -source-filename=%s
+protocol A{class d<g{var e{enum b<T:a#^A^#