Use xz prebuilt

Instead of whichever xz happens to be on the PATH.

Bug: 36130900
Test: m
Change-Id: Ib37d8db4e935ef8f69f3d43b5065c22d34028cf3
diff --git a/core/config.mk b/core/config.mk
index fbd4696..cb5ddc8 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -601,6 +601,7 @@
 SOONG_ZIP := $(SOONG_HOST_OUT_EXECUTABLES)/soong_zip
 MERGE_ZIPS := $(SOONG_HOST_OUT_EXECUTABLES)/merge_zips
 XMLLINT := $(SOONG_HOST_OUT_EXECUTABLES)/xmllint
+XZ := $(prebuilt_build_tools_bin)/xz
 ZIP2ZIP := $(SOONG_HOST_OUT_EXECUTABLES)/zip2zip
 ZIPTIME := $(prebuilt_build_tools_bin)/ziptime
 
diff --git a/core/definitions.mk b/core/definitions.mk
index d3d9928..b0b92de 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -1853,7 +1853,7 @@
   $(PRIVATE_OBJCOPY) -S --remove-section .gdb_index --remove-section .comment --keep-symbols=$@.keep_symbols $@.mini_debuginfo && \
   $(PRIVATE_OBJCOPY) --rename-section saved_debug_frame=.debug_frame $@.mini_debuginfo && \
   rm -f $@.mini_debuginfo.xz && \
-  xz $@.mini_debuginfo && \
+  $(XZ) $@.mini_debuginfo && \
   $(PRIVATE_OBJCOPY) --add-section .gnu_debugdata=$@.mini_debuginfo.xz $@; \
 else \
   cp -f $< $@; \
diff --git a/core/dynamic_binary.mk b/core/dynamic_binary.mk
index f44b8a8..ebbe71c 100644
--- a/core/dynamic_binary.mk
+++ b/core/dynamic_binary.mk
@@ -145,15 +145,15 @@
 
 ifeq ($(my_strip_module),mini-debug-info)
 # Strip the binary, but keep debug frames and symbol table in a compressed .gnu_debugdata section.
-$(strip_output): $(strip_input) | $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_STRIP) $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_OBJCOPY) $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_NM)
+$(strip_output): $(strip_input) $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_STRIP) $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_OBJCOPY) $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_NM) $(XZ)
 	$(transform-to-stripped-keep-mini-debug-info)
 else ifneq ($(filter true no_debuglink,$(my_strip_module)),)
 # Strip the binary
-$(strip_output): $(strip_input) | $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_STRIP)
+$(strip_output): $(strip_input) $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_STRIP)
 	$(transform-to-stripped)
 else ifeq ($(my_strip_module),keep_symbols)
 # Strip only the debug frames, but leave the symbol table.
-$(strip_output): $(strip_input) | $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_STRIP)
+$(strip_output): $(strip_input) $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_STRIP)
 	$(transform-to-stripped-keep-symbols)
 
 # A product may be configured to strip everything in some build variants.