Use find(1)'s -exec directly.

toybox xargs doesnt have --no-run-if-empty:

  xargs: Unknown option no-run-if-empty (see "xargs --help")

But we shouldn't need it anyway.

Test: make -j32 showcommands dist TARGET_BUILD_APPS='Launcher3 Launcher3Tests' EMMA_INSTRUMENT_STATIC=true TARGET_BUILD_VARIANT=userdebug
Change-Id: I72f680c27b58a42b9fb9de1a0bc4187cabcfb516
diff --git a/core/jacoco.mk b/core/jacoco.mk
index 6406df4..148bb04 100644
--- a/core/jacoco.mk
+++ b/core/jacoco.mk
@@ -51,7 +51,7 @@
 	  -d $(PRIVATE_UNZIPPED_PATH) \
 	  $(PRIVATE_INCLUDE_ARGS)
 	(cd $(PRIVATE_UNZIPPED_PATH) && rm -rf $(PRIVATE_EXCLUDE_ARGS))
-	(cd $(PRIVATE_UNZIPPED_PATH) && find -not -name "*.class" -type f | xargs --no-run-if-empty rm)
+	(cd $(PRIVATE_UNZIPPED_PATH) && find -not -name "*.class" -type f -exec rm {} \;)
 	touch $(PRIVATE_UNZIPPED_TIMESTAMP_PATH)
 # Unfortunately in the previous task above,
 # 'rm -rf $(PRIVATE_EXCLUDE_ARGS)' needs to be a separate