Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/b19d8a0..5488ca8

Rolling v8/third_party/catapult: https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+log/08a6e0a..51b3178

TBR=machenbach@chromium.org,vogelheim@chromium.org,hablich@chromium.org

Change-Id: Ic07c2cd8459688129791ac27e185e2e1308d5a48
Reviewed-on: https://chromium-review.googlesource.com/513445Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45501}

DEPS

@@ -8,7 +8,7 @@ vars = {
 
 deps = {
   "v8/build":
-    Var("chromium_url") + "/chromium/src/build.git" + "@" + "b19d8a0c0ee0fb00c6982a7a3714efda621e94cc",
+    Var("chromium_url") + "/chromium/src/build.git" + "@" + "5488ca8df80a453c5c686e61be9c953f690a5463",
   "v8/tools/gyp":
     Var("chromium_url") + "/external/gyp.git" + "@" + "eb296f67da078ec01f5e3a9ea9cdc6d26d680161",
   "v8/third_party/icu":
@@ -48,7 +48,7 @@ deps_os = {
     "v8/third_party/android_tools":
       Var("chromium_url") + "/android_tools.git" + "@" + "cb6bc21107001e2f2eeee2707b482b2b755baf51",
     "v8/third_party/catapult":
-      Var('chromium_url') + "/external/github.com/catapult-project/catapult.git" + "@" + "08a6e0ac161db7309d8f9cad0ccd38e0b1fd41e0",
+      Var('chromium_url') + "/external/github.com/catapult-project/catapult.git" + "@" + "51b31788b65c9d6053287a49eb295ce2da657f5a",
   },
 }