Revert "Mark __jit_debug_register_code as a unique symbol"

This reverts commit 5caf652d7bfb43bdd2f3addfe8021a5fb8e3f796.

Something's going wrong on the Mac host side, even though this should be target only.

Change-Id: I165f23ee25cb1c4b0732e1d1afcae75271abcb09
diff --git a/runtime/Android.mk b/runtime/Android.mk
index 12fc4c2..1fdffe3 100644
--- a/runtime/Android.mk
+++ b/runtime/Android.mk
@@ -226,17 +226,6 @@
 LIBART_TARGET_LDFLAGS :=
 LIBART_HOST_LDFLAGS :=
 
-# Keep the __jit_debug_register_code symbol as a unique symbol during ICF for architectures where
-# we use gold as the linker (arm, aarch64, x86, x86_64). The symbol is used by the debuggers to
-# detect when new jit code is generated. We don't want it to be called when a different function
-# with the same (empty) body is called.
-JIT_DEBUG_REGISTER_CODE_LDFLAGS := -Wl,--keep-unique,__jit_debug_register_code
-LIBART_TARGET_LDFLAGS_arm    := $(JIT_DEBUG_REGISTER_CODE_LDFLAGS)
-LIBART_TARGET_LDFLAGS_arm64  := $(JIT_DEBUG_REGISTER_CODE_LDFLAGS)
-LIBART_TARGET_LDFLAGS_x86    := $(JIT_DEBUG_REGISTER_CODE_LDFLAGS)
-LIBART_TARGET_LDFLAGS_x86_64 := $(JIT_DEBUG_REGISTER_CODE_LDFLAGS)
-JIT_DEBUG_REGISTER_CODE_LDFLAGS :=
-
 LIBART_TARGET_SRC_FILES := \
   $(LIBART_COMMON_SRC_FILES) \
   jdwp/jdwp_adb.cc \
@@ -585,14 +574,8 @@
 LIBART_HOST_DEFAULT_INSTRUCTION_SET_FEATURES :=
 LIBART_TARGET_DEFAULT_INSTRUCTION_SET_FEATURES :=
 2ND_LIBART_TARGET_DEFAULT_INSTRUCTION_SET_FEATURES :=
-LIBART_HOST_LDFLAGS :=
 LIBART_TARGET_LDFLAGS :=
-LIBART_TARGET_LDFLAGS_arm :=
-LIBART_TARGET_LDFLAGS_arm64 :=
-LIBART_TARGET_LDFLAGS_x86 :=
-LIBART_TARGET_LDFLAGS_x86_64 :=
-LIBART_TARGET_LDFLAGS_mips :=
-LIBART_TARGET_LDFLAGS_mips64 :=
+LIBART_HOST_LDFLAGS :=
 LIBART_TARGET_SRC_FILES :=
 LIBART_TARGET_SRC_FILES_arm :=
 LIBART_TARGET_SRC_FILES_arm64 :=