Merge "Update makefiles for host clang."

libbacktrace/Android.build.mk

@@ -73,6 +73,7 @@ endif
 ifeq ($(build_type),host)
   # Only build if host builds are supported.
   ifeq ($(build_host),true)
+    LOCAL_CFLAGS += -Wno-extern-c-compat
     ifneq ($($(module)_libc++),)
       include external/libcxx/libcxx.mk
     endif

libziparchive/Android.mk

@@ -63,7 +63,8 @@ LOCAL_CPP_EXTENSION := .cc
 LOCAL_CFLAGS += \
     -DGTEST_OS_LINUX \
     -DGTEST_HAS_STD_STRING \
-    -Werror
+    -Werror \
+    -Wno-unnamed-type-template-args
 LOCAL_SRC_FILES := zip_archive_test.cc
 LOCAL_STATIC_LIBRARIES := libziparchive-host \
 	libz \