Attempt to fix broken unit test.

Author: Carl Peto

test/Parse/ConditionalCompilation/basicParseErrors.swift

@@ -87,7 +87,7 @@ struct S {
 
 #endif
 
-#if arch(leg) // expected-warning {{unknown architecture for build configuration 'arch'}} expected-note{{did you mean 'arm'?}} {{10-13=arm}}
+#if arch(arn) // expected-warning {{unknown architecture for build configuration 'arch'}} expected-note{{did you mean 'arm'?}} {{10-13=arm}}
 #endif
 
 #if _endian(mid) // expected-warning {{unknown endianness for build configuration '_endian'}} expected-note{{did you mean 'big'?}} {{13-16=big}}
@@ -123,7 +123,7 @@ undefinedFunc() // expected-error {{cannot find 'undefinedFunc' in scope}}
 #endif
 
 /// Invalid platform condition arguments don't invalidate the whole condition.
-#if !arch(tecture) && !os(ystem) && !_endian(ness)
+#if !arch(arn) && !os(ystem) && !_endian(ness)
 // expected-warning@-1 {{unknown architecture for build configuration 'arch'}}
 // expected-note@-2 {{did you mean 'arm'?}} {{11-18=arm}}
 // expected-warning@-3 {{unknown operating system for build configuration 'os'}}
@@ -136,7 +136,7 @@ func fn_k() {}
 #endif
 fn_k()
 
-#if os(cillator) || arch(ive)
+#if os(cillator) || arch(arn)
 // expected-warning@-1 {{unknown operating system for build configuration 'os'}}
 // expected-note@-2 {{did you mean 'macOS'?}} {{8-16=macOS}}
 // expected-note@-3 {{did you mean 'iOS'?}} {{8-16=iOS}}