Convert to Soong

See build/soong/README.md for more information.

This effectively moves some of these targets from /system/xbin to
/system/bin, as Soong is not supporting xbin. I've attempted to fix and
find any external dependencies to these paths.

Test: m anrd app-launcher bootctrl.default bootctl cpustats crypto iotop
Change-Id: I3eb58d8a260884652b5ee827ac88ece429d76448
diff --git a/CleanSpec.mk b/CleanSpec.mk
index ce834cf..37ef3da 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -46,6 +46,9 @@
 
 $(call add-clean-step, rm -f $(PRODUCT_OUT)/system.img $(PRODUCT_OUT)/userdata.img)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/EXECUTABLES/taskstats_intermediates)
+$(call add-clean-step, rm -f $(TARGET_OUT_OPTIONAL_EXECUTABLES)/anrd)
+$(call add-clean-step, rm -f $(TARGET_OUT_OPTIONAL_EXECUTABLES)/cpustats)
+$(call add-clean-step, rm -f $(TARGET_OUT_OPTIONAL_EXECUTABLES)/crypto)
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************