mksysinfo.sh: Handle TIOCSPGRP if too complex for -fdump-go-spec.

    
    Reviewed-on: https://go-review.googlesource.com/16534

From-SVN: r229645

gcc/go/gofrontend/MERGE

-65ff1d5fb581717229e5c02796d719671a1e8628
+6b4b969f552b8f9ac87a715d5ad06e52bd031b60
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.

libgo/mksysinfo.sh

@@ -183,6 +183,9 @@ enum {
 #ifdef TIOCSCTTY
   TIOCSCTTY_val = TIOCSCTTY,
 #endif
+#ifdef TIOCSPGRP
+  TIOCSPGRP_val = TIOCSPGRP,
+#endif
 #ifdef TIOCGPTN
   TIOCGPTN_val = TIOCGPTN,
 #endif
@@ -917,6 +920,11 @@ if ! grep '^const TIOCSCTTY' ${OUT} >/dev/null 2>&1; then
     echo 'const TIOCSCTTY = _TIOCSCTTY_val' >> ${OUT}
   fi
 fi
+if ! grep '^const TIOCSPGRP' ${OUT} >/dev/null 2>&1; then
+  if grep '^const _TIOCSPGRP_val' ${OUT} >/dev/null 2>&1; then
+    echo 'const TIOCSPGRP = _TIOCSPGRP_val' >> ${OUT}
+  fi
+fi
 if ! grep '^const TIOCGPTN' ${OUT} >/dev/null 2>&1; then
   if grep '^const _TIOCGPTN_val' ${OUT} >/dev/null 2>&1; then
     echo 'const TIOCGPTN = _TIOCGPTN_val' >> ${OUT}