Fix armv7-sony-vita-newlibeabihf LLVM target triple

It was previously normalized by LLVM to `thumbv7a-vita-unknown-eabihf`,
which is probably wrong, as Vita is the OS.

Author: madsmtm

compiler/rustc_target/src/spec/targets/armv7_sony_vita_newlibeabihf.rs

@@ -15,7 +15,7 @@ pub(crate) fn target() -> Target {
     );
 
     Target {
-        llvm_target: "thumbv7a-vita-eabihf".into(),
+        llvm_target: "thumbv7a-sony-vita-eabihf".into(),
         metadata: TargetMetadata {
             description: Some(
                 "Armv7-A Cortex-A9 Sony PlayStation Vita (requires VITASDK toolchain)".into(),