[test] Fix some lit syntax errors.

Author: Greg Parker

test/1_stdlib/Intents.swift

@@ -2,7 +2,7 @@
 // REQUIRES: executable_test
 
 // Intents is only public on OS X and iOS
-// UNSUPPORTED: OS=watchos OS=tvos
+// UNSUPPORTED: OS=watchos, OS=tvos
 
 // FIXME: un-XFAIL the test once the build bots have been updated to the
 //        more recent SDK versions.

test/SIL/Serialization/deserialize_appkit.sil

@@ -7,4 +7,5 @@
 
 // CHECK-NOT: Unknown
 
-// REQUIRES: rdar://23805004
+// FIXME: rdar://23805004 Non-fragile shared functions are incorrectly being referenced in fragile functions
+// REQUIRES: rdar23805004

test/SIL/Serialization/deserialize_foundation.sil

@@ -6,4 +6,5 @@
 
 // CHECK-NOT: Unknown
 
-// REQUIRES: rdar://23805004
+// FIXME: rdar://23805004 Non-fragile shared functions are incorrectly being referenced in fragile functions
+// REQUIRES: rdar23805004

test/multifile/error-type/one-module/main.swift

@@ -5,6 +5,7 @@
 
 // REQUIRES: executable_test
 
-// REQUIRES: disabled // Fails on iPhone simulator target due to possible MC-JIT bug
+// FIXME: Fails on iPhone simulator target due to possible MC-JIT bug
+// REQUIRES: disabled 
 
 extension NuclearMeltdown : ErrorProtocol {}