Add support for Android 2.3+

There have been plenty of ppl involved in creating this version.
I don't wanna mention names as I'm sure I'd forget someone so I
just tell where help has been done:
- The partial android versions done by various ppl
- Testing on different android devices
- reviewing code (especially the in core changes)
- testing controls
- reviewing texts

A big thank you to everyone helping this to be completed!

src/log.cpp

@@ -26,6 +26,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "threads.h"
 #include "debug.h"
 #include "gettime.h"
+#include "porting.h"
+#include "config.h"
 
 std::list<ILogOutput*> log_outputs[LMT_NUM_VALUES];
 std::map<threadid_t, std::string> log_threadnames;
@@ -139,6 +141,9 @@ public:
 	void printbuf()
 	{
 		log_printline(m_lev, m_buf);
+#ifdef __ANDROID__
+		__android_log_print(ANDROID_LOG_ERROR, PROJECT_NAME, "%s", m_buf.c_str());
+#endif
 	}
 
 	void bufchar(char c)