Pack relocation tables for dynamic executables

  Add replocation-packer step for dynmic executables.

  Enable it by default for arm and arm64 platforms.

Bug: http://b/18051137
Change-Id: I0c88fd31595bcea62a087f219acb9ecf9c80f2e5
diff --git a/core/config.mk b/core/config.mk
index 60ea592..83295d9 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -425,6 +425,10 @@
 # dx is java behind a shell script; no .exe necessary.
 DX := $(HOST_OUT_EXECUTABLES)/dx
 ZIPALIGN := $(HOST_OUT_EXECUTABLES)/zipalign$(HOST_EXECUTABLE_SUFFIX)
+
+# relocation packer
+RELOCATION_PACKER := prebuilts/misc/$(BUILD_OS)-$(HOST_PREBUILT_ARCH)/relocation_packer/relocation_packer
+
 FINDBUGS_DIR := external/owasp/sanitizer/tools/findbugs/bin
 FINDBUGS := $(FINDBUGS_DIR)/findbugs
 EMMA_JAR := external/emma/lib/emma$(COMMON_JAVA_PACKAGE_SUFFIX)