powerpc64-ibm-aix: fix cfg(target_abi) value

Author: RalfJung

compiler/rustc_target/src/spec/base/aix.rs

@@ -7,7 +7,7 @@ use crate::spec::{
 
 pub(crate) fn opts() -> TargetOptions {
     TargetOptions {
-        abi: Abi::VecExtAbi,
+        abi: Abi::VecDefault,
         code_model: Some(CodeModel::Large),
         cpu: "pwr7".into(),
         os: Os::Aix,

tests/ui/check-cfg/well-known-values.stderr

@@ -129,7 +129,7 @@ warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
 LL |     target_abi = "_UNEXPECTED_VALUE",
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
-   = note: expected values for `target_abi` are: ``, `abi64`, `abiv2`, `abiv2hf`, `eabi`, `eabihf`, `elfv1`, `elfv2`, `fortanix`, `ilp32`, `ilp32e`, `llvm`, `macabi`, `sim`, `softfloat`, `spe`, `uwp`, `vec-extabi`, and `x32`
+   = note: expected values for `target_abi` are: ``, `abi64`, `abiv2`, `abiv2hf`, `eabi`, `eabihf`, `elfv1`, `elfv2`, `fortanix`, `ilp32`, `ilp32e`, `llvm`, `macabi`, `sim`, `softfloat`, `spe`, `uwp`, `vec-default`, and `x32`
    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more information about checking conditional configuration
 
 warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`