target: move base specs to spec/base

Signed-off-by: David Wood <david@davidtw.co>

Author: davidtwco

Diff for: compiler/rustc_target/src/spec/aarch64_apple_darwin.rs

@@ -1,4 +1,4 @@
-use super::apple_base::{macos_llvm_target, opts, Arch};
+use crate::spec::base::apple::{macos_llvm_target, opts, Arch};
 use crate::spec::{FramePointer, SanitizerSet, Target, TargetOptions};
 
 pub fn target() -> Target {

Diff for: compiler/rustc_target/src/spec/aarch64_apple_ios.rs

@@ -1,4 +1,4 @@
-use super::apple_base::{ios_llvm_target, opts, Arch};
+use crate::spec::base::apple::{ios_llvm_target, opts, Arch};
 use crate::spec::{FramePointer, SanitizerSet, Target, TargetOptions};
 
 pub fn target() -> Target {