Move gcmole to toolchain.gypi

it's referenced from isolate.gypi which in turn is used in
non-standalone builds as well.

BUG=chromium:609107
R=machenbach@chromium.org

Review-Url: https://codereview.chromium.org/2023783003
Cr-Commit-Position: refs/heads/master@{#36591}

gypfiles/standalone.gypi

@@ -382,9 +382,6 @@
     # fpxx - compatibility mode, it chooses fp32 or fp64 depending on runtime
     #        detection
     'mips_fpu_mode%': 'fp32',
-
-    # Indicates if gcmole tools are downloaded by a hook.
-    'gcmole%': 0,
   },
   'target_defaults': {
     'variables': {

gypfiles/toolchain.gypi

@@ -131,6 +131,9 @@
 
     # Link-Time Optimizations
     'use_lto%': 0,
+
+    # Indicates if gcmole tools are downloaded by a hook.
+    'gcmole%': 0,
   },
   'conditions': [
     ['host_arch=="ia32" or host_arch=="x64" or \