Extend relocation packing to cover arm64.

tools/relocation_packer/src/run_length_encoder.cc

Index: tools/relocation_packer/src/run_length_encoder.cc
diff --git a/tools/relocation_packer/src/run_length_encoder.cc b/tools/relocation_packer/src/run_length_encoder.cc
index 2d68bf4c1e892e4a4ea35a192bfad76428f6d931..5b9e39e4a4e7e63b840fd5ae0a9228418005c4da 100644
--- a/tools/relocation_packer/src/run_length_encoder.cc
+++ b/tools/relocation_packer/src/run_length_encoder.cc
@@ -14,7 +14,7 @@ namespace relocation_packer {
 namespace {
 
 // Generate a vector of deltas between the r_offset fields of adjacent
-// ARM relative relocations.
+// relative relocations.
 void GetDeltas(const std::vector<ELF::Rel>& relocations,
                std::vector<ELF::Addr>* deltas) {
   CHECK(relocations.size() >= 2);
@@ -92,7 +92,7 @@ void Uncondense(ELF::Addr addr,
 
 }  // namespace
 
-// Encode ARM relative relocations into a run-length encoded (packed)
+// Encode relative relocations into a run-length encoded (packed)
 // representation.
 void RelocationRunLengthCodec::Encode(const std::vector<ELF::Rel>& relocations,
                                       std::vector<ELF::Xword>* packed) {
@@ -116,7 +116,7 @@ void RelocationRunLengthCodec::Encode(const std::vector<ELF::Rel>& relocations,
   packed->at(0) = (packed->size() - 2) >> 1;
 }
 
-// Decode ARM relative relocations from a run-length encoded (packed)
+// Decode relative relocations from a run-length encoded (packed)
 // representation.
 void RelocationRunLengthCodec::Decode(const std::vector<ELF::Xword>& packed,
                                       std::vector<ELF::Rel>* relocations) {