another directory rename: failstar -> fail

"failstar" sounds like a name for a cruise liner from the 80s.  As "*" isn't a
desirable part of directory names, just name the whole thing "fail/", the core
parts being stored in "fail/core/".

Additionally fixing two build system dependency issues:
 - missing jobserver -> protomessages dependency
 - broken bochs -> fail dependency (add_custom_target DEPENDS only allows plain
   file dependencies ... cmake for the win)


git-svn-id: https://www4.informatik.uni-erlangen.de/i4svn/danceos/trunk/devel/fail@956 8c4709b5-6ec9-48aa-a5cd-a96041d1645a

core/jobserver/messagedefs/FailControlMessage.proto

@@ -0,0 +1,16 @@
+message FailControlMessage {
+  enum Command {
+    // Minions may send these:
+    NEED_WORK = 0;	// server replies with WORK_FOLLOWS or DIE
+    RESULT_FOLLOWS = 1;	// followed by experiment-specific ExperimentData message (holding both original parameters and experiment result)
+
+    // JobServer may send these:
+    WORK_FOLLOWS = 5;	// followed by experiment-specific ExperimentData message
+    COME_AGAIN = 6;	// no experiment-specific ExperimentData at the moment, but Campaign is not over yet
+    DIE = 7;		// tells the client to terminate
+  }
+
+  required Command command = 1;
+  optional uint32 workloadID = 2;
+  required uint64 build_id = 3;	// identifying the client/server build (e.g., build time in unixtime format)
+}