Hurd port for gcc go PATCH 5-10(23)

[Svante Signell]

* src_libgo_configure.ac.diff: Define GOOS=gnu and LIBGO_IS_GNU
* src_libgo_Makefile.am.diff: Add support for GNU/Hurd.
* src_libgo_Makefile.in.diff: Update accordingly with autreconf2.64
* src_libgo_mksysinfo.sh.diff: Define SYS_IOCTL to 0 if not defined,
 Fix: #define EWOULDBLOCK EAGAIN in <errno.h>
 Fix: #define st_dev st_fsid in <sysstat.h
* src_libgo_runtime_getncpu-gnu.c.diff: New file
* src_libgo_go_syscall_wait.c.diff: Define WCONTINUED to 0 if not
defined.

src_libgo_configure.ac.diff
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src_libgo_go_syscall_wait.c.diff
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src_libgo_Makefile.am.diff
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src_libgo_Makefile.in.diff
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src_libgo_mksysinfo.sh.diff
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src_libgo_runtime_getncpu-gnu.c.diff
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