Add missing //third_party:guava dependency to execution-requirements.

Change-Id: I68797947905166b71a58d8332be18fc7bd6de30d
PiperOrigin-RevId: 155360327

src/main/java/com/google/devtools/build/lib/BUILD

diff --git a/src/main/java/com/google/devtools/build/lib/BUILD b/src/main/java/com/google/devtools/build/lib/BUILD
index 2e26cb3..8bd4cd6 100644
--- a/src/main/java/com/google/devtools/build/lib/BUILD
+++ b/src/main/java/com/google/devtools/build/lib/BUILD
@@ -519,6 +519,7 @@
     deps = [
         ":util",
         "//third_party:auto_value",
+        "//third_party:guava",
     ],
 )