Change default value of objc_per_proto_includes to match new value in .blazerc

RELNOTES: Change default value of objc_per_proto_includes to false

--
MOS_MIGRATED_REVID=101965455
diff --git a/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcCommandLineOptions.java b/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcCommandLineOptions.java
index 9cc4fd6..3a7a0fa 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcCommandLineOptions.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcCommandLineOptions.java
@@ -128,7 +128,7 @@
   public Label defaultProvisioningProfile;
 
   @Option(name = "objc_per_proto_includes",
-      defaultValue = "true",
+      defaultValue = "false",
       category = "undocumented",
       help = "Whether to add include path entries for every individual proto file.")
   public boolean perProtoIncludes;