Allow building OS X 10.7 binaries.

scripts/common.sh

Index: scripts/common.sh
===================================================================
--- scripts/common.sh	(revision 122817)
+++ scripts/common.sh	(working copy)
@@ -15,6 +15,10 @@
   uname -r | grep 10\.[0-9]\.[0-9] >/dev/null
 }
 
+system_is_lion() {
+  uname -r | grep 11\.[0-9]\.[0-9] >/dev/null
+}
+
 checkout_and_patch_valgrind_variant() {
   # $1 = Valgrind-variant revision
   # $2 = source dir
@@ -158,12 +162,25 @@
       elif system_is_snow_leopard
       then
         build_valgrind "mac_10.6" "--build=amd64-darwin"
+      elif system_is_lion
+      then
+        build_valgrind "mac_10.7"
       else
-        echo "You have Darwin kernel different from 9.X.X or 10.X.X" >&2
+        echo "You have Darwin kernel different from 9.X.X--11.X.X" >&2
         echo "Please, don't put the resulting binaries into Chromium SVN" >&2
         build_valgrind "local"
       fi
       ;;
+    "Darwin x86_64")
+      if system_is_lion
+      then
+        build_valgrind "mac_10.7"
+      else
+        echo "You have Darwin kernel different from 11.X.X" >&2
+        echo "Please, don't put the resulting binaries into Chromium SVN" >&2
+        build_valgrind "local"
+      fi
+      ;;
     *)
       build_valgrind "local"
       ;;