Retrieve String/Class references from .data.bimg.rel.ro.

For PIC AOT-compiled app, use the .data.bimg.rel.ro to load
the boot image String/Class references instead of using the
mmapped boot image ClassTable and InternTable.

Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing --pictest --npictest
Test: Pixel 2 XL boots.
Test: testrunner.py --target --optimizing --pictest --npictest
Bug: 71526895
Change-Id: Id5703229777aecb589a933a41f92e44d3ec02a3d
diff --git a/compiler/optimizing/code_generator_x86.h b/compiler/optimizing/code_generator_x86.h
index e21ccb5..342b8a9 100644
--- a/compiler/optimizing/code_generator_x86.h
+++ b/compiler/optimizing/code_generator_x86.h
@@ -634,16 +634,17 @@
   const X86InstructionSetFeatures& isa_features_;
 
   // PC-relative method patch info for kBootImageLinkTimePcRelative/kBootImageRelRo.
+  // Also used for type/string patches for kBootImageRelRo (same linker patch as for methods).
   ArenaDeque<X86PcRelativePatchInfo> boot_image_method_patches_;
   // PC-relative method patch info for kBssEntry.
   ArenaDeque<X86PcRelativePatchInfo> method_bss_entry_patches_;
   // PC-relative type patch info for kBootImageLinkTimePcRelative.
   ArenaDeque<X86PcRelativePatchInfo> boot_image_type_patches_;
-  // Type patch locations for kBssEntry.
+  // PC-relative type patch info for kBssEntry.
   ArenaDeque<X86PcRelativePatchInfo> type_bss_entry_patches_;
-  // String patch locations; type depends on configuration (intern table or boot image PIC).
+  // PC-relative String patch info for kBootImageLinkTimePcRelative.
   ArenaDeque<X86PcRelativePatchInfo> boot_image_string_patches_;
-  // String patch locations for kBssEntry.
+  // PC-relative String patch info for kBssEntry.
   ArenaDeque<X86PcRelativePatchInfo> string_bss_entry_patches_;
 
   // Patches for string root accesses in JIT compiled code.