Only include debugger.gyp for isolation

R=yangguo@chromium.org,machenbach@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2529333002
Cr-Commit-Position: refs/heads/master@{#41300}

gypfiles/all.gyp

@@ -27,10 +27,14 @@
         }],
         ['v8_enable_inspector==1', {
           'dependencies': [
-            '../test/debugger/debugger.gyp:*',
             '../test/inspector/inspector.gyp:*',
           ],
         }],
+        ['v8_enable_inspector==1 and test_isolation_mode != "noop"', {
+          'dependencies': [
+            '../test/debugger/debugger.gyp:*',
+          ],
+        }],
         ['test_isolation_mode != "noop"', {
           'dependencies': [
             '../test/bot_default.gyp:*',