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/llprocesslauncher.cpp

@@ -64,6 +64,11 @@ void LLProcessLauncher::setWorkingDirectory(const std::string &dir)
 	mWorkingDir = dir;
 }
 
+const std::string& LLProcessLauncher::getExecutable() const
+{
+	return mExecutable;
+}
+
 void LLProcessLauncher::clearArguments()
 {
 	mLaunchArguments.clear();