Remove text-relocation support for lp32

Bug: 20013628
Change-Id: Idaf8012f00ee1304d429c3b42f9ebc6b648c55b8
diff --git a/linker/linker.h b/linker/linker.h
index bf3e7bf..ed26917 100644
--- a/linker/linker.h
+++ b/linker/linker.h
@@ -226,8 +226,8 @@
   // value to get the corresponding address in the process' address space.
   ElfW(Addr) load_bias;
 
-#if !defined(__LP64__)
-  bool has_text_relocations;
+#if defined(__arm__)
+  bool unused4; // DO NOT USE, maintained for compatibility
 #endif
   bool has_DT_SYMBOLIC;