[newlib-cygwin] Cygwin: implement sched_getcpu

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=1e0a1f59d9e64430ce796c578e0813100c0cf0d7 commit 1e0a1f59d9e64430ce796c578e0813100c0cf0d7 Author: Corinna Vinschen Date: Tue Aug 7 14:51:10 2018 +0200 Cygwin: implement sched_getcpu * create new function

[newlib-cygwin] Fix return value on aio_read/write success

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=b1952c03a8d6970f0fb4bcfffb9cfb5b525884d6 commit b1952c03a8d6970f0fb4bcfffb9cfb5b525884d6 Author: Mark Geisert Date: Mon Aug 6 22:54:06 2018 -0700 Fix return value on aio_read/write success Internally track resultant byte