Add mips/mips64 to _DEVIL_BUILD_PRODUCT_DEPS

Adds md5sum and forwarder device for mips and mips64.

BUG=missing md5sum and forwarder for mips devices

Review URL: https://codereview.chromium.org/1507233005

Cr-Commit-Position: refs/heads/master@{#364079}

build/android/devil_chromium.py

@@ -17,6 +17,8 @@
     'armeabi-v7a': 'forwarder_dist',
     'arm64-v8a': 'forwarder_dist',
     'x86': 'forwarder_dist',
+    'mips': 'forwarder_dist',
+    'mips64': 'forwarder_dist',
   },
   'forwarder_host': {
     'any': 'host_forwarder',
@@ -25,6 +27,8 @@
     'armeabi-v7a': 'md5sum_dist',
     'arm64-v8a': 'md5sum_dist',
     'x86': 'md5sum_dist',
+    'mips': 'md5sum_dist',
+    'mips64': 'md5sum_dist',
   },
   'md5sum_host': {
     'any': 'md5sum_bin_host',