Implement HLoadClass/kBssEntry for boot image.

Test: m test-art-host
Test: m test-art-host with CC
Test: m test-art-target on Nexus 9
Test: Nexus 9 boots.
Test: Build aosp_mips64-eng
Bug: 30627598
Change-Id: I168f24dedd5fb54a1e4215ecafb947ffb0dc3280
diff --git a/compiler/optimizing/code_generator_mips.h b/compiler/optimizing/code_generator_mips.h
index bc0772c..c8fd325 100644
--- a/compiler/optimizing/code_generator_mips.h
+++ b/compiler/optimizing/code_generator_mips.h
@@ -455,6 +455,7 @@
   PcRelativePatchInfo* NewPcRelativeStringPatch(const DexFile& dex_file,
                                                 dex::StringIndex string_index);
   PcRelativePatchInfo* NewPcRelativeTypePatch(const DexFile& dex_file, dex::TypeIndex type_index);
+  PcRelativePatchInfo* NewTypeBssEntryPatch(const DexFile& dex_file, dex::TypeIndex type_index);
   PcRelativePatchInfo* NewPcRelativeDexCacheArrayPatch(const DexFile& dex_file,
                                                        uint32_t element_offset);
   Literal* DeduplicateBootImageStringLiteral(const DexFile& dex_file,
@@ -505,8 +506,10 @@
   ArenaDeque<PcRelativePatchInfo> pc_relative_string_patches_;
   // Deduplication map for boot type literals for kBootImageLinkTimeAddress.
   BootTypeToLiteralMap boot_image_type_patches_;
-  // PC-relative type patch info; type depends on configuration (app .bss or boot image PIC).
+  // PC-relative type patch info for kBootImageLinkTimePcRelative.
   ArenaDeque<PcRelativePatchInfo> pc_relative_type_patches_;
+  // PC-relative type patch info for kBssEntry.
+  ArenaDeque<PcRelativePatchInfo> type_bss_entry_patches_;
   // Deduplication map for patchable boot image addresses.
   Uint32ToLiteralMap boot_image_address_patches_;