[test] Add some alias crash signatures

The signatures here are bogus, put the correct signatures in as
aliases.

Author: hamishknight

validation-test/IDE/crashers/488be7ca295930f4.swift

@@ -1,5 +1,4 @@
-// {"kind":"complete","signature":"doPrintTypeInterface(swift::CompilerInvocation const&, llvm::StringRef, llvm::StringRef)"}
-// Actual signature: checkSingleOverride
+// {"kind":"complete","signature":"doPrintTypeInterface(swift::CompilerInvocation const&, llvm::StringRef, llvm::StringRef)","aliases":["checkSingleOverride(swift::ValueDecl*, swift::ValueDecl*)"]}
 // RUN: not --crash %target-swift-ide-test -code-completion --code-completion-token=COMPLETE -source-filename %s
 class a { subscript(a) a { set } class b : a { override subscript(a) a {
 #^COMPLETE^#

validation-test/IDE/crashers/64cbd48634eb9eac.swift

@@ -1,4 +1,3 @@
-// {"kind":"complete","signature":"swift::irgen::IRGenModule::emitLazyObjCProtocolDefinition(swift::ProtocolDecl*)"}
-// Actual signature: matchCallArguments
+// {"kind":"complete","signature":"swift::irgen::IRGenModule::emitLazyObjCProtocolDefinition(swift::ProtocolDecl*)","aliases":["swift::constraints::ConstraintSystem::getType(swift::ASTNode) const"]}
 // RUN: not --crash %target-swift-ide-test -code-completion --code-completion-token=COMPLETE -code-completion-diagnostics -source-filename %s
 { switch { case let c(#^COMPLETE^# b) a

validation-test/IDE/crashers/88724bf42982b346.swift

@@ -1,4 +1,3 @@
-// {"kind":"complete","signature":"swift::ide::printTypeUSR(swift::Type, llvm::raw_ostream&)"}
-// Actual signature: getContextSubstitutions
+// {"kind":"complete","signature":"swift::ide::printTypeUSR(swift::Type, llvm::raw_ostream&)","aliases":["swift::TypeBase::getContextSubstitutions(swift::DeclContext const*, swift::GenericEnvironment*)"]}
 // RUN: not --crash %target-swift-ide-test -code-completion --code-completion-token=COMPLETE -source-filename %s
 protocol a extension a where Self == { extension a#^COMPLETE^# protocol b

validation-test/IDE/crashers/96faa1ddefcb57f.swift

@@ -1,4 +1,3 @@
-// {"kind":"complete","signature":"swift::Demangle::ASTBuilder::findTypeDecl(swift::DeclContext*, swift::Identifier, swift::Identifier, swift::Demangle::Node::Kind)"}
-// Actual signature: openTypeParameter
+// {"kind":"complete","signature":"swift::Demangle::ASTBuilder::findTypeDecl(swift::DeclContext*, swift::Identifier, swift::Identifier, swift::Demangle::Node::Kind)","aliases":["openTypeParameter(swift::constraints::ConstraintSystem&, swift::Type, swift::GenericEnvironment*, llvm::DenseMap<swift::SubstitutableType*, swift::TypeVariableType*, llvm::DenseMapInfo<swift::SubstitutableType*, void>, llvm::detail::DenseMapPair<swift::SubstitutableType*, swift::TypeVariableType*>>&)"]}
 // RUN: not --crash %target-swift-ide-test -code-completion --code-completion-token=COMPLETE -source-filename %s
 struct a<b:RangeReplaceableCollection where b ={ c: b.Element? { #^COMPLETE^#