Allow Skyframe graph lookups and value retrievals to throw InterruptedException.

The only place we now don't handle InterruptedException is in the action graph created after analysis, since I'm not sure that will be around for that much longer.

--
MOS_MIGRATED_REVID=130327770
diff --git a/src/main/java/com/google/devtools/build/lib/query2/BlazeQueryEnvironment.java b/src/main/java/com/google/devtools/build/lib/query2/BlazeQueryEnvironment.java
index a29c2c6..ad6b540 100644
--- a/src/main/java/com/google/devtools/build/lib/query2/BlazeQueryEnvironment.java
+++ b/src/main/java/com/google/devtools/build/lib/query2/BlazeQueryEnvironment.java
@@ -48,7 +48,6 @@
 import com.google.devtools.build.lib.query2.engine.VariableContext;
 import com.google.devtools.build.lib.util.Preconditions;
 import com.google.devtools.build.lib.vfs.PathFragment;
-
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.HashMap;
@@ -136,7 +135,8 @@
 
   @Override
   public void getTargetsMatchingPattern(
-      QueryExpression caller, String pattern, Callback<Target> callback) throws QueryException {
+      QueryExpression caller, String pattern, Callback<Target> callback)
+      throws QueryException, InterruptedException {
     // We can safely ignore the boolean error flag. The evaluateQuery() method above wraps the
     // entire query computation in an error sensor.