coredump: align coredump description pointer
coredump: align coredump description pointer

next = inote.descdata + align_power (inote.descsz, 2);

this align is missing, leading to parsing errors. In one case
libunwind only found 1 thread out of 4.

vtjnash/libunwind,frida/libunwind,rantala/libunwind,djwatson/libunwind,unkadoug/libunwind,djwatson/libunwind,vtjnash/libunwind,rantala/libunwind,libunwind/libunwind,yuyichao/libunwind,libunwind/libunwind,yuyichao/libunwind,libunwind/libunwind,djwatson/libunwind,yuyichao/libunwind,unkadoug/libunwind,unkadoug/libunwind,frida/libunwind,frida/libunwind,rantala/libunwind,vtjnash/libunwind