Remove android_set_abort_message from libstdc++.so

This function is already exported by libc.so there
is no need for it in libstdc++.so

Bug: http://b/28987948
Test: python tests/run-all.py --abi armeabi --platform android-21 --suite build /ssd/aosp/master-ndk/out/android-ndk-r13-beta1
Test: python tests/run-all.py --abi arm64-v8a --platform android-21 --suite build /ssd/aosp/master-ndk/out/android-ndk-r13-beta1
Change-Id: Ia67fd60d31b9427db27ffc2ba980b331da3a8e6a
6 files changed