gerrit.sh: Request at least 1024 file descriptors

We may run out of transient file descriptors if packedGitOpenFiles is
too low, such as the default setting of 128.  Assume we can get at
least 1024 file descriptors and request that many by default.

Bug: issue 460
Change-Id: I45e62a8af9f3763eacf977431c299193f014bd1e
Signed-off-by: Shawn O. Pearce <sop@google.com>

gerrit-pgm/src/main/resources/com/google/gerrit/pgm/gerrit.sh

diff --git a/gerrit-pgm/src/main/resources/com/google/gerrit/pgm/gerrit.sh b/gerrit-pgm/src/main/resources/com/google/gerrit/pgm/gerrit.sh
index d29cdf4..4f7c13e 100755
--- a/gerrit-pgm/src/main/resources/com/google/gerrit/pgm/gerrit.sh
+++ b/gerrit-pgm/src/main/resources/com/google/gerrit/pgm/gerrit.sh
@@ -295,6 +295,7 @@
 GERRIT_FDS=`get_config --int core.packedGitOpenFiles`
 test -z "$GERRIT_FDS" && GERRIT_FDS=128
 GERRIT_FDS=`expr $GERRIT_FDS + $GERRIT_FDS`
+test $GERRIT_FDS -lt 1024 && GERRIT_FDS=1024
 
 GERRIT_USER=`get_config --get container.user`