Don't explicitly link libgcc.a into libtvm_runtime.so on Android (#10052)
Don't explicitly link libgcc.a into libtvm_runtime.so on Android (#10052)

Setting Android toolchain via CMAKE_TOOLCHAIN_FILE also causes necessary
flags to be added. Also, newer versions of the Android NDK no longer ship
libgcc.a, so this takes care of that as well.
dmlc/tvm,dmlc/tvm,dmlc/tvm,dmlc/tvm,dmlc/tvm,dmlc/tvm,dmlc/tvm,dmlc/tvm,dmlc/tvm