Fix linker_asan64 symlink

Soong now appends the suffix to the symlink, so the multilib-specific
symlink is no longer necessary.

Test: m -j out/target/product/angler/system/bin/linker_asan64
Test: Examine LOCAL_MODULE_SYMLINKS in out/soong/Android-aosp_angler.mk
Change-Id: I913a318bb31de3e630eebd2d68041a55ce3eccaf

linker/Android.bp

@@ -129,13 +129,10 @@ cc_binary {
     static_executable: true,
 
     name: "linker",
-    multilib: {
-        lib32: {
     symlinks: ["linker_asan"],
-        },
+    multilib: {
         lib64: {
             suffix: "64",
-            symlinks: ["linker_asan64"],
         },
     },
     target: {