On dartc invocation, adds -client flag to non-mac builds if not running in batch mode (tests)

compiler/scripts/dartc.sh

 #!/bin/bash --posix
 # Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 set -e
 
 SCRIPT_DIR=$(dirname $0)
 DARTC_HOME=$(dirname $SCRIPT_DIR)
 DARTC_LIBS=$DARTC_HOME/lib
 DARTC_SDK=$(dirname $DARTC_HOME)/dart-sdk
 
 if [ -x /usr/libexec/java_home ]; then
   export JAVA_HOME=$(/usr/libexec/java_home -v '1.6+')
 fi
 
 EXTRA_JVMARGS="-Xss2M "
 OS=`uname | tr [A-Z] [a-z]`
 if [ "$OS" == "darwin" ] ; then
   # Bump up the heap on Mac VMs, some of which default to 128M or less.
   # Users can specify DART_JVMARGS in the environment to override
   # this setting. Force to 32 bit client vm. 64 bit and server VM make for 
   # poor performance.
-  EXTRA_JVMARGS+="-Xmx256M -client -d32"
+  EXTRA_JVMARGS+=" -Xmx256M -client -d32 "
+else
+  # On other architectures
+  # -batch invocations will do better with a server vm
+  # invocations for analyzing a single file do better with a client vm
+  FOUND_BATCH=0
+  for ARG in "$@"
+  do
+    case $ARG in
+      -batch|--batch)
+        FOUND_BATCH=1
+        ;;
+      *)
+        ;;
+    esac
+  done
+  if [ $FOUND_BATCH = 0 ] ; then
+    EXTRA_JVMARGS+=" -client "
+  fi
 fi
 
 exec java $EXTRA_JVMARGS $DART_JVMARGS -ea -classpath "@CLASSPATH@" \
   com.google.dart.compiler.DartCompiler --dart-sdk ${DARTC_SDK} $@