Enable coverage only when LOCAL_SDK_VERSION > 23

Bug: http://b/116873221

The coverage runtime (libclang_rt.profile) needs stderr, which is
exported by bionic only after API level 23.

Test: Build with coverage on globally
Change-Id: I1bdfbbf248d1743d529e9f40f0b52da92bb20ef7

core/binary.mk

@@ -254,6 +254,14 @@ ifneq ($(LOCAL_SDK_VERSION),)
   else # LOCAL_NDK_STL_VARIANT must be none
     # Do nothing.
   endif
+
+  # Clang's coverage/profile runtime needs symbols like 'stderr' that were not
+  # exported from libc prior to API level 23
+  ifneq ($(my_ndk_api),current)
+    ifeq ($(call math_lt, $(my_ndk_api),23),true)
+      my_native_coverage := false
+    endif
+  endif
 endif
 
 ifneq ($(LOCAL_USE_VNDK),)