Remove deprecated Android.mk files

These directories all have Android.bp files that are always used now,
delete the Android.mk files.

Change-Id: I8b0c89072a660c4a7a30fcefc76a7bbe247df977
diff --git a/liblog/Android.soong.mk b/liblog/Android.soong.mk
new file mode 100644
index 0000000..6c4dff5
--- /dev/null
+++ b/liblog/Android.soong.mk
@@ -0,0 +1,3 @@
+LOCAL_PATH := $(my-dir)
+
+include $(call first-makefiles-under,$(LOCAL_PATH))