libgo patch committed: redirect mkrsysinfo.sh grep output to /dev/null

[Ian Lance Taylor]

This patch to libgo redirects the output of a grep command in
mkrsysinfo.sh to /dev/null.  The output otherwise appears in the
middle of a build log, where it is harmless but confusing.
Bootstrapped and ran Go testsuite on x86_64-pc-linux-gnu.  Committed
to mainline.

Ian

Index: gcc/go/gofrontend/MERGE
===================================================================
--- gcc/go/gofrontend/MERGE     (revision 241432)
+++ gcc/go/gofrontend/MERGE     (working copy)
@@ -1,4 +1,4 @@
-6d9929a1641b180e724c2fdcdd55f6a254f1dec0
+7fb11c908ddab4932cc416f16657cec3bc878a1a
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
Index: libgo/mkrsysinfo.sh
===================================================================
--- libgo/mkrsysinfo.sh (revision 241347)
+++ libgo/mkrsysinfo.sh (working copy)
@@ -78,7 +78,7 @@ if grep '^const _epoll_data_offset ' ${O
   fi
 fi
 # Make sure EPOLLET is positive.
-if grep '^const _EPOLLET = [0-9]' gen-sysinfo.go; then
+if grep '^const _EPOLLET = [0-9]' gen-sysinfo.go > /dev/null 2>&1; then
   echo "const _EPOLLETpos = _EPOLLET" >> ${OUT}
 else
   echo "const _EPOLLETpos = 0x80000000" >> ${OUT}