Cleanup NATIVE_COVERAGE, PRIVATE_ARFLAGS

Disable the NATIVE_COVERAGE code when not in use. Provide the proper
PRIVATE_ variables so that the $DISPLAY environment variable isn't
encoded into the ninja file.

Remove PRIVATE_ARFLAGS, which is never set.

Test: compare build-aosp_flounder.ninja
Test: NATIVE_COVERAGE=true build-aosp_flounder.ninja, inspect
Change-Id: I2a52de440fd991cdc5761ff8bd58a474892d2dfc
diff --git a/core/definitions.mk b/core/definitions.mk
index 61e0461..39c6604 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -1584,7 +1584,7 @@
         filelist="$$filelist $$ldir/$$ext$$f"; \
     done ; \
     $($(PRIVATE_2ND_ARCH_VAR_PREFIX)TARGET_AR) $($(PRIVATE_2ND_ARCH_VAR_PREFIX)TARGET_GLOBAL_ARFLAGS) \
-        $(PRIVATE_ARFLAGS) $@ $$filelist
+        $@ $$filelist
 
 endef
 
@@ -1609,7 +1609,7 @@
 $(extract-and-include-target-whole-static-libs)
 $(call split-long-arguments,$($(PRIVATE_2ND_ARCH_VAR_PREFIX)TARGET_AR) \
     $($(PRIVATE_2ND_ARCH_VAR_PREFIX)TARGET_GLOBAL_ARFLAGS) \
-    $(PRIVATE_ARFLAGS) $@,$(PRIVATE_ALL_OBJECTS))
+    $@,$(PRIVATE_ALL_OBJECTS))
 endef
 
 # $(1): the full path of the source static library.
@@ -1633,8 +1633,7 @@
         $(PRIVATE_AR) p $$lib_to_include $$f > $$ldir/$$ext$$f; \
         filelist="$$filelist $$ldir/$$ext$$f"; \
     done ; \
-    $(PRIVATE_AR) $(AUX_GLOBAL_ARFLAGS) \
-        $(PRIVATE_ARFLAGS) $@ $$filelist
+    $(PRIVATE_AR) $(AUX_GLOBAL_ARFLAGS) $@ $$filelist
 
 endef
 
@@ -1652,8 +1651,7 @@
 @rm -f $@
 $(extract-and-include-aux-whole-static-libs)
 $(call split-long-arguments,$(PRIVATE_AR) \
-    $(AUX_GLOBAL_ARFLAGS) \
-    $(PRIVATE_ARFLAGS) $@,$(PRIVATE_ALL_OBJECTS))
+    $(AUX_GLOBAL_ARFLAGS) $@,$(PRIVATE_ALL_OBJECTS))
 endef
 
 define transform-o-to-aux-executable-inner
@@ -1721,7 +1719,7 @@
         filelist="$$filelist $$ldir/$$ext$$f"; \
     done ; \
     $($(PRIVATE_2ND_ARCH_VAR_PREFIX)$(PRIVATE_PREFIX)AR) $($(PRIVATE_2ND_ARCH_VAR_PREFIX)$(PRIVATE_PREFIX)GLOBAL_ARFLAGS) \
-        $(PRIVATE_ARFLAGS) $@ $$filelist
+        $@ $$filelist
 
 endef
 
@@ -1757,8 +1755,8 @@
 $(extract-and-include-host-whole-static-libs)
 $(create-dummy.o-if-no-objs)
 $(call split-long-arguments,$($(PRIVATE_2ND_ARCH_VAR_PREFIX)$(PRIVATE_PREFIX)AR) \
-    $($(PRIVATE_2ND_ARCH_VAR_PREFIX)$(PRIVATE_PREFIX)GLOBAL_ARFLAGS) \
-    $(PRIVATE_ARFLAGS) $@,$(PRIVATE_ALL_OBJECTS) $(get-dummy.o-if-no-objs))
+    $($(PRIVATE_2ND_ARCH_VAR_PREFIX)$(PRIVATE_PREFIX)GLOBAL_ARFLAGS) $@,\
+    $(PRIVATE_ALL_OBJECTS) $(get-dummy.o-if-no-objs))
 $(delete-dummy.o-if-no-objs)
 endef