[AIX] add -bdbg:namedsects:ss link arg

On AIX, PGO runtimes and ifunc support requires the named section linker feature which collects the name sections together and generates start/stop symbols for them.

This change adds the option to the default linker args for the target.

Author: daltenty

compiler/rustc_target/src/spec/targets/powerpc64_ibm_aix.rs

@@ -5,7 +5,13 @@ pub(crate) fn target() -> Target {
     base.max_atomic_width = Some(64);
     base.add_pre_link_args(
         LinkerFlavor::Unix(Cc::No),
-        &["-b64", "-bpT:0x100000000", "-bpD:0x110000000", "-bcdtors:mbr:0:s"],
+        &[
+            "-b64",
+            "-bpT:0x100000000",
+            "-bpD:0x110000000",
+            "-bcdtors:mbr:0:s",
+            "-bdbg:namedsects:ss", // PGO and ifunc support depends on the named sections linker feature
+        ],
     );
 
     Target {