Initial android support (#17)

* Upload Android armv7 libs

* Fix debug build

* utlvector: fix undefined behavior

* wscript: add --use-ccache option

* wscript: store ccache in a separate directory

* Propertly use gl4es

* fontconfig: fix font detection

* [android]remove fontconfig dependency

* Add build guide for other platforms

Co-authored-by: JusicP <slender87844@gmail.com>
Co-authored-by: nillerusr <nillerusr@users.noreply.github.com>

tier0/threadtools.cpp

@@ -23,8 +23,13 @@
 #elif defined(POSIX)
 
 #if !defined(OSX)
+#if defined(ANDROID)
+	#include <fcntl.h>
+	#include <unistd.h>
+#else
 	#include <sys/fcntl.h>
 	#include <sys/unistd.h>
+#endif
 	#define sem_unlink( arg )
 	#define OS_TO_PTHREAD(x) (x)
 #else