gem5: codebase patched to compile with ag++

This changes allows us to compile the gem5 simulator with ag++. It
was tested with ag++ v0.8, built Apr 18 2013. Most of the changes
are preprocessor directives like #ifndef __puma which have been
inserted into the gem5 code. Unfortunately, a python script and a
SWIG input file have been patched, too.
Additionally, the CMake file has been updated. A single call to
"make" now invokes the ag++ (instead of the g++) compiler front
end. The new CMake target "gem5-allclean" should be used to clean
the current project when building FailGem5. In addition to cleaning
the Fail build directory, it also invokes "scons -c" in the gem5
build directory; that is, gem5 is cleaned as well.

Change-Id: I20a92f025f34f626b81e30f2c873baeba189f83b

simulators/gem5/src/sim/insttracer.hh

@@ -114,9 +114,12 @@ class InstRecord
     void setData(uint16_t d) { data.as_int = d; data_status = DataInt16; }
     void setData(uint8_t d) { data.as_int = d; data_status = DataInt8; }
 
+// DanceOS modification
+#ifndef __puma // bug #375
     void setData(int64_t d) { setData((uint64_t)d); }
     void setData(int32_t d) { setData((uint32_t)d); }
     void setData(int16_t d) { setData((uint16_t)d); }
+#endif
     void setData(int8_t d)  { setData((uint8_t)d); }
 
     void setData(double d) { data.as_double = d; data_status = DataDouble; }