Move libc MTE init to separate file

Change-Id: Iad76170d2eb0641438edc6cca6193d1791c44b1d
diff --git a/libc/Android.bp b/libc/Android.bp
index ae6df52..165a921 100644
--- a/libc/Android.bp
+++ b/libc/Android.bp
@@ -264,6 +264,7 @@
     name: "libc_init_static",
     defaults: ["libc_defaults"],
     srcs: [
+        "bionic/libc_init_mte.cpp",
         "bionic/libc_init_static.cpp",
         ":elf_note_sources",
     ],