Fixed a linux build issue when the llhavok suddenly required rtti in order to link.

I added a #ifndef hack to v3math.h to eliminate LLString's from the llhavok project.
I also removed lluuid.h's dependency on LLString (using std::string) instead and
then fixed a bunch of bad dependency fallout on a few files around the project
that suddenly lost their hidden access to some fundamental includes.
The important parts were reviewed with James.

indra/llcommon/indra_constants.h

@@ -9,6 +9,7 @@
 #ifndef LL_INDRA_CONSTANTS_H
 #define LL_INDRA_CONSTANTS_H
 
+#include "stdtypes.h"
 #include "lluuid.h"
 
 // Viewer object cache version, change if object update

indra/llcommon/llsd.cpp

@@ -8,6 +8,7 @@
 
 #include "llsd.h"
 
+#include <sstream>
 #include <math.h>
 #include "../llmath/llmath.h"
 #include "llformat.h"

indra/llmath/v3math.h

@@ -12,13 +12,17 @@
 #include "llerror.h"
 #include "llmath.h"
 
-#include "llsd.h"
+#ifndef NO_RTTI
+// LLSD includes LLString which is incompatible with some other
+// stuff (Havok) that requires -fno-rtti
+#	include "llsd.h"
+#endif
 class LLVector4;
 class LLMatrix3;
 class LLVector3d;
 class LLQuaternion;
 
-//  Llvector3 = |x y z w|
+//  LLvector3 = |x y z w|
 
 static const U32 LENGTHOFVECTOR3 = 3;
 
@@ -41,6 +45,9 @@ class LLVector3
 		inline explicit LLVector3(const F32 *vec);				// Initializes LLVector3 to (vec[0]. vec[1], vec[2])
 		explicit LLVector3(const LLVector3d &vec);				// Initializes LLVector3 to (vec[0]. vec[1], vec[2])
 		explicit LLVector3(const LLVector4 &vec);				// Initializes LLVector4 to (vec[0]. vec[1], vec[2])
+#ifndef NO_RTTI
+// LLSD includes LLString which is incompatible with some other
+// stuff (Havok) that requires -fno-rtti
 		LLVector3(const LLSD& sd)
 		{
 			setValue(sd);
@@ -67,6 +74,7 @@ class LLVector3
 			setValue(sd);
 			return *this;
 		}
+#endif
 
 		inline BOOL isFinite() const;									// checks to see if all values of LLVector3 are finite
 		BOOL		clamp(F32 min, F32 max);		// Clamps all values to (min,max), returns TRUE if data changed

indra/test/llpipeutil.cpp

@@ -10,6 +10,7 @@
 #include "llpipeutil.h"
 
 #include <stdlib.h>
+#include <sstream>
 
 #include "llbufferstream.h"
 #include "lldefs.h"

indra/test/llsd_new_tut.cpp

@@ -12,6 +12,7 @@
 #include "lltut.h"
 
 #include "llsd.h"
+#include "llstring.h"
 
 namespace tut
 {