meta-ohos-core: Fix building bind if _Unwind_GetIP is a macro

bind assumes _Unwind_GetIP is a function; this is not necessarily
true, in some implementations of libunwind (e.g. arm32 version of
gcc builtin) it's a macro.

Signed-off-by: Bernhard Rosenkränzer <bernhard.rosenkraenzer.ext@huawei.com>