crash handler, logger and oengles changes

* save log messages to otclient.txt
* fixes in FrameBuffer and HardwareBuffer to work with OpenGLES
* possibility to get compilation information from lua (compiler version, build date, build revision, build type)
* make crash handler more informatave
* handle assert crash signals (SIGABRT)

src/framework/core/logger.cpp

@@ -37,6 +37,11 @@ void Logger::log(Fw::LogLevel level, const std::string& message)
     std::string outmsg = logPrefixes[level] + message;
     std::cout << outmsg << std::endl;
 
+    if(m_outFile.good()) {
+        m_outFile << outmsg << std::endl;
+        m_outFile.flush();
+    }
+
     std::size_t now = std::time(NULL);
     m_logMessages.push_back(LogMessage(level, outmsg, now));
 
@@ -72,3 +77,15 @@ void Logger::fireOldMessages()
             m_onLog(logMessage.level, logMessage.message, logMessage.when);
     }
 }
+
+void Logger::setLogFile(const std::string& file)
+{
+    m_outFile.open(file.c_str(), std::ios::out | std::ios::app);
+    if(!m_outFile.is_open() || !m_outFile.good()) {
+        logError("Unable to save log to '", file, "'");
+        return;
+    }
+
+    m_outFile << "\n== application started at " << Fw::dateTimeString() << std::endl;
+    m_outFile.flush();
+}

src/framework/core/logger.h

@@ -41,11 +41,13 @@ public:
     void logFunc(Fw::LogLevel level, const std::string& message, std::string prettyFunction);
 
     void fireOldMessages();
+    void setLogFile(const std::string& file);
     void setOnLog(const OnLogCallback& onLog) { m_onLog = onLog; }
 
 private:
     std::list<LogMessage> m_logMessages;
     OnLogCallback m_onLog;
+    std::ofstream m_outFile;
 };
 
 extern Logger g_logger;