Add third_party/colorama to DEPS

In the chromium_revision DEPS roll CL (r6516) the addition
of the third_party/colorama was missed since our trybots
currently cannot handle DEPS changes in tryjob patches
Adding third_party/colorama/src fixes the Android build.

TEST=Passing local compile with GYP_DEFINES="OS=android component=static_library fastbuild=1 target_arch=arm"

Review URL:

git-svn-id: 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/DEPS b/DEPS
index 8312828..f4beffd 100644
--- a/DEPS
+++ b/DEPS
@@ -51,6 +51,9 @@
     From("chromium_deps", "src/third_party/clang_format/script"),
+  "third_party/colorama/src":
+    From("chromium_deps", "src/third_party/colorama/src"),
     Var("chromium_trunk") + "/src/third_party/expat@" + Var("chromium_revision"),