Port Crashpad support from alchemy, with some small tweaks

Moved initCrashReporting into LLAppViewer, everything we use there is
crossplatform enough that duplicating code is silly

Removes unused gCrashSettings
Adds MBFatalError, that's right, Crash Loop is now translatable!
Adds consent notification prompt to first login... enjoy that, everyone.

indra/newview/llappviewerlinux.cpp

@@ -119,7 +119,6 @@ int main( int argc, char **argv )
 	}
 	delete viewer_app_ptr;
 	viewer_app_ptr = NULL;
-
 	return 0;
 }
 
@@ -143,20 +142,12 @@ bool LLAppViewerLinux::init()
 	
 	bool success = LLAppViewer::init();
 
-#if LL_SEND_CRASH_REPORTS
-    if (success)
-    {
-        LLAppViewer* pApp = LLAppViewer::instance();
-        pApp->initCrashReporting();
-    }
-#endif
-
 	return success;
 }
 
 bool LLAppViewerLinux::restoreErrorTrap()
 {
-	// *NOTE:Mani there is a case for implementing this or the mac.
+	// *NOTE:Mani there is a case for implementing this on the mac.
 	// Linux doesn't need it to my knowledge.
 	return true;
 }
@@ -347,12 +338,6 @@ bool LLAppViewerLinux::sendURLToOtherInstance(const std::string& url)
 }
 #endif // LL_DBUS_ENABLED
 
-void LLAppViewerLinux::initCrashReporting(bool reportFreeze)
-{
-	// Singu Note: this is where original code forks crash logger process.
-	// Singularity doesn't need it
-}
-
 bool LLAppViewerLinux::beingDebugged()
 {
 	static enum {unknown, no, yes} debugged = unknown;
@@ -397,7 +382,7 @@ bool LLAppViewerLinux::beingDebugged()
 #endif
 }
 
-bool LLAppViewerLinux::initLogging()
+void LLAppViewerLinux::initLoggingAndGetLastDuration()
 {
 	// Remove the last stack trace, if any
 	// This file is no longer created, since the move to Google Breakpad
@@ -406,7 +391,7 @@ bool LLAppViewerLinux::initLogging()
 		gDirUtilp->getExpandedFilename(LL_PATH_LOGS,"stack_trace.log");
 	LLFile::remove(old_stack_file);
 
-	return LLAppViewer::initLogging();
+	LLAppViewer::initLoggingAndGetLastDuration();
 }
 
 bool LLAppViewerLinux::initParseCommandLine(LLCommandLineParser& clp)