Update libgo/configure to restore it to the master version.

Update a few binary files that were changed in the master gc repo,
copied into the gofrontend repo, but not correctly copied into the GCC
repo.  The changes are all minor and do not affect any actual tests.
Two instances of "http" changed to "https", and two timestamps were
zeroed out.

From-SVN: r242582

libgo/configure

@@ -810,6 +810,7 @@ enable_werror
 enable_version_specific_runtime_libs
 with_libffi
 with_libatomic
+with_system_libunwind
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1459,6 +1460,7 @@ Optional Packages:
                           both]
   --without-libffi        don't use libffi
   --without-libatomic     don't use libatomic
+  --with-system-libunwind use installed libunwind
 
 Some influential environment variables:
   CC          C compiler command
@@ -2483,6 +2485,9 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
 
+
+
+
 ac_config_headers="$ac_config_headers config.h"
 
 
@@ -3467,12 +3472,10 @@ done
 
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-#include <stdio.h>
+
 int
 main ()
 {
-FILE *f = fopen ("conftest.out", "w");
- return ferror (f) || fclose (f) != 0;
 
   ;
   return 0;
@@ -11206,7 +11209,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11207 "configure"
+#line 11212 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -14679,7 +14682,42 @@ $as_echo "#define AC_APPLE_UNIVERSAL_BUILD 1" >>confdefs.h
  esac
 
 
-GCC_CHECK_UNWIND_GETIPINFO
+
+
+# Check whether --with-system-libunwind was given.
+if test "${with_system_libunwind+set}" = set; then :
+  withval=$with_system_libunwind;
+fi
+
+  # If system-libunwind was not specifically set, pick a default setting.
+  if test x$with_system_libunwind = x; then
+    case ${target} in
+      ia64-*-hpux*) with_system_libunwind=yes ;;
+      *) with_system_libunwind=no ;;
+    esac
+  fi
+  # Based on system-libunwind and target, do we have ipinfo?
+  if  test x$with_system_libunwind = xyes; then
+    case ${target} in
+      ia64-*-*) have_unwind_getipinfo=no ;;
+      *) have_unwind_getipinfo=yes ;;
+    esac
+  else
+    # Darwin before version 9 does not have _Unwind_GetIPInfo.
+
+    case ${target} in
+      *-*-darwin[3-8]|*-*-darwin[3-8].*) have_unwind_getipinfo=no ;;
+      *) have_unwind_getipinfo=yes ;;
+    esac
+
+  fi
+
+  if test x$have_unwind_getipinfo = xyes; then
+
+$as_echo "#define HAVE_GETIPINFO 1" >>confdefs.h
+
+  fi
+
 
 for ac_header in port.h sched.h semaphore.h sys/file.h sys/mman.h syscall.h sys/epoll.h sys/event.h sys/inotify.h sys/ptrace.h sys/syscall.h sys/user.h sys/utsname.h sys/select.h sys/socket.h net/if.h net/if_arp.h net/route.h netpacket/packet.h sys/prctl.h sys/mount.h sys/vfs.h sys/statfs.h sys/timex.h sys/sysinfo.h utime.h linux/ether.h linux/fs.h linux/reboot.h netinet/icmp6.h netinet/in_syst.h netinet/ip.h netinet/ip_mroute.h netinet/if_ether.h
 do :
@@ -16269,6 +16307,8 @@ ac_configure_args="${multilib_arg} ${ac_configure_args}"
 multi_basedir="$multi_basedir"
 CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
 CC="$CC"
+CXX="$CXX"
+GFORTRAN="$GFORTRAN"
 AMDEP_TRUE="$AMDEP_TRUE" ac_aux_dir="$ac_aux_dir"