Shuffled LL_COMMON_API around in spots to match v2

Added llformat_to_utf8
Added LLProcessLauncher::getExecutable()
LLStringTableEntry() ctor and dtor definitions moved from .h to .cpp
(should be safe)

indra/llcommon/llmd5.cpp

@@ -83,7 +83,7 @@ documentation and/or software.
 #include "llmd5.h"
 
 #include <cassert>
-#include <iostream>
+#include <iostream>		// cerr
 
 // how many bytes to grab at a time when checking files
 const int LLMD5::BLOCK_LEN = 4096;