Torque: Fix mips compile error

Change-Id: I6a97005943b36c0dab70fe8f18bbfcab443c3e03
Reviewed-on: https://chromium-review.googlesource.com/1013566
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Daniel Clifford <danno@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52619}

BUILD.gn

@@ -839,8 +839,17 @@ action("run_torque") {
     "tools/gcmole/:*",
   ]
 
+  # We reuse the snapshot toolchain for building torque to not build v8_libbase
+  # on the host more than once. On mips with big endian, the snapshot toolchain
+  # is the target toolchain and, hence, can't be used.
+  v8_torque_toolchain = v8_snapshot_toolchain
+  if (host_cpu == "x64" &&
+      (v8_current_cpu == "mips" || v8_current_cpu == "mips64")) {
+    v8_torque_toolchain = "//build/toolchain/linux:clang_x64"
+  }
+
   deps = [
-    ":torque($v8_snapshot_toolchain)",
+    ":torque($v8_torque_toolchain)",
   ]
 
   script = "tools/run.py"
@@ -859,7 +868,7 @@ action("run_torque") {
   ]
 
   args = [
-    "./" + rebase_path(get_label_info(":torque($v8_snapshot_toolchain)",
+    "./" + rebase_path(get_label_info(":torque($v8_torque_toolchain)",
                                       "root_out_dir") + "/torque",
                        root_build_dir),
     "-o",