[test] Add some not-yet-crashing crashers

These would crash with an assertion I'm planning on adding, make sure
I fix them before adding the assert.

Author: hamishknight

validation-test/compiler_crashers_fixed/TypeChecker-typeCheckBinding-0e62c5.swift

@@ -0,0 +1,12 @@
+// {"kind":"typecheck","original":"e679747c","signature":"swift::TypeChecker::typeCheckBinding(swift::Pattern*&, swift::Expr*&, swift::DeclContext*, swift::Type, swift::PatternBindingDecl*, unsigned int, swift::optionset::OptionSet<swift::TypeCheckExprFlags, unsigned int>)"}
+// RUN: not %target-swift-frontend -typecheck %s
+enum a<b>: Error {
+  case c(
+}
+struct d {
+    bar( Error? -> Void)
+  {
+    bar {
+      e in
+      return if let a<Int>.c(f) = e {
+        f

validation-test/compiler_crashers_fixed/TypeChecker-typeCheckBinding-1a334a.swift

@@ -0,0 +1,5 @@
+// {"kind":"typecheck","original":"deecafdd","signature":"swift::TypeChecker::typeCheckBinding(swift::Pattern*&, swift::Expr*&, swift::DeclContext*, swift::Type, swift::PatternBindingDecl*, unsigned int, swift::optionset::OptionSet<swift::TypeCheckExprFlags, unsigned int>)"}
+// RUN: not %target-swift-frontend -typecheck %s
+return {
+  lazy var a = <#expression#>
+}

validation-test/compiler_crashers_fixed/TypeChecker-typeCheckBinding-353fda.swift

@@ -0,0 +1,8 @@
+// {"kind":"typecheck","original":"1309b52b","signature":"swift::TypeChecker::typeCheckBinding(swift::Pattern*&, swift::Expr*&, swift::DeclContext*, swift::Type, swift::PatternBindingDecl*, unsigned int, swift::optionset::OptionSet<swift::TypeCheckExprFlags, unsigned int>)"}
+// RUN: not %target-swift-frontend -typecheck %s
+{
+  let a = 0.0
+  switch a {
+  case let !b where b:
+  }
+}

validation-test/compiler_crashers_fixed/TypeChecker-typeCheckBinding-adf55f.swift

@@ -0,0 +1,7 @@
+// {"kind":"typecheck","original":"22c204bc","signature":"swift::TypeChecker::typeCheckBinding(swift::Pattern*&, swift::Expr*&, swift::DeclContext*, swift::Type, swift::PatternBindingDecl*, unsigned int, swift::optionset::OptionSet<swift::TypeCheckExprFlags, unsigned int>)"}
+// RUN: not %target-swift-frontend -typecheck %s
+struct a: ExpressibleByIntegerLiteral
+  func *** (a , a )
+}
+{
+  let b = 3 *** 4

validation-test/compiler_crashers_fixed/TypeChecker-typeCheckBinding-c1121c.swift

@@ -0,0 +1,4 @@
+// {"kind":"typecheck","original":"18f513af","signature":"swift::TypeChecker::typeCheckBinding(swift::Pattern*&, swift::Expr*&, swift::DeclContext*, swift::Type, swift::PatternBindingDecl*, unsigned int, swift::optionset::OptionSet<swift::TypeCheckExprFlags, unsigned int>)"}
+// RUN: not %target-swift-frontend -typecheck %s
+{
+  guard let a = a   "