UI failures fix

Author: Umesh Kalappa

src/test/ui/intrinsics/intrinsic-alignment.rs

@@ -19,7 +19,8 @@ mod rusti {
           target_os = "macos",
           target_os = "netbsd",
           target_os = "openbsd",
-          target_os = "solaris"))]
+          target_os = "solaris",
+          target_os = "vxworks"))]
 mod m {
     #[main]
     #[cfg(target_arch = "x86")]

src/test/ui/signal-alternate-stack-cleanup.rs

@@ -7,6 +7,7 @@
 // ignore-wasm32-bare no libc
 // ignore-windows
 // ignore-sgx no libc
+// ignore-vxworks no SIGWINCH in user space
 
 #![feature(rustc_private)]
 extern crate libc;

src/test/ui/structs-enums/rec-align-u64.rs

@@ -40,7 +40,8 @@ struct Outer {
           target_os = "macos",
           target_os = "netbsd",
           target_os = "openbsd",
-          target_os = "solaris"))]
+          target_os = "solaris",
+          target_os = "vxworks"))]
 mod m {
     #[cfg(target_arch = "x86")]
     pub mod m {