Unconditionally include gcc's stdc-predef.h if it is available.

--
MOS_MIGRATED_REVID=89964638
diff --git a/src/main/java/com/google/devtools/build/lib/analysis/BuildView.java b/src/main/java/com/google/devtools/build/lib/analysis/BuildView.java
index 5bf199d..1ad6f32 100644
--- a/src/main/java/com/google/devtools/build/lib/analysis/BuildView.java
+++ b/src/main/java/com/google/devtools/build/lib/analysis/BuildView.java
@@ -540,7 +540,7 @@
   }
 
   private void prepareToBuild(PackageRootResolver resolver) throws ViewCreationFailedException {
-    for (BuildConfiguration config : configurations.getTargetConfigurations()) {
+    for (BuildConfiguration config : configurations.getAllConfigurations()) {
       config.prepareToBuild(directories.getExecRoot(), getArtifactFactory(), resolver);
     }
   }