Add a small utility for dumping the system clipboard's contents on GTK.

build/SConscript.main

Index: build/SConscript.main
===================================================================
--- build/SConscript.main	(revision 7483)
+++ build/SConscript.main	(working copy)
@@ -113,6 +113,7 @@
     SKIA_DIR              = '$OBJ_ROOT/skia',
     TESTING_DIR           = '$OBJ_ROOT/testing',
     THIRD_PARTY_DIR       = '$OBJ_ROOT/third_party',
+    TOOLS_DIR             = '$OBJ_ROOT/tools',
     V8_DIR                = '$OBJ_ROOT/v8',
     WEBKIT_DIR            = '$OBJ_ROOT/webkit',
 
@@ -135,6 +136,8 @@
 
     THIRD_PARTY_WEBKIT_DIR = '$THIRD_PARTY_DIR/WebKit',
 
+    GTK_CLIP_DUMP_DIR     = '$TOOLS_DIR/gtk_clipboard_dump',
+
     PYTHON=sys.executable,
 
     PERL                  = 'perl',
@@ -213,6 +216,7 @@
         '$MODP_B64_DIR/modp_b64.scons',
         '$ZLIB_DIR/zlib.scons',
     ],
+    tools = '$GTK_CLIP_DUMP_DIR/gcd.scons',
     v8 = '$OBJ_ROOT/build/SConscript.v8',
     webkit = '$WEBKIT_DIR/webkit.scons',
 )