Disable 'd8' on Linux until we get readline everywhere.

build/temp_gyp/v8.gyp

Index: build/temp_gyp/v8.gyp
===================================================================
--- build/temp_gyp/v8.gyp	(revision 12845)
+++ build/temp_gyp/v8.gyp	(working copy)
@@ -455,6 +455,11 @@
         }],
       ],
     },
+  ],
+
+  'conditions': [ ['OS!="linux"', { 'targets': [
+    # TODO(sgk):  temporarily disable 'd8' target on Linux while
+    # we work out getting the readline library on all the systems.
     {
       'target_name': 'd8',
       'type': 'executable',
@@ -485,13 +490,11 @@
         }],
       ],
     },
-  ],
-
-  # TODO(sgk):  temporarily disable the arm targets on Linux while
-  # we work out how to refactor the generator and/or add configuration
-  # settings to the .gyp file to handle building both variants in
-  # the same output directory.
-  'conditions': [ ['OS!="linux"', { 'targets': [
+    # TODO(sgk):  temporarily disable the arm targets on Linux while
+    # we work out how to refactor the generator and/or add configuration
+    # settings to the .gyp file to handle building both variants in
+    # the same output directory.
+    #
     # ARM targets, to test ARM code generation.  These use an ARM simulator
     # (src/simulator-arm.cc).  The ARM targets are not snapshot-enabled.
     {