Avoid trying to use CLOCK_SGI_CYCLE on Android

The Android headers defines CLOCK_SGI_CYCLE but the call fails at
runtime as it's not implemented. Combined with getticks() not
checking the return value of clock_gettime() this causes bogus
values to be returned from getticks().

Author: fornwall

kernel/cycle.h

@@ -438,7 +438,7 @@ INLINE_ELAPSED(__inline)
 #endif
 /*----------------------------------------------------------------*/
 /* SGI/Irix */
-#if defined(HAVE_CLOCK_GETTIME) && defined(CLOCK_SGI_CYCLE) && !defined(HAVE_TICK_COUNTER)
+#if defined(HAVE_CLOCK_GETTIME) && defined(CLOCK_SGI_CYCLE) && !defined(HAVE_TICK_COUNTER) && !defined(__ANDROID__)
 typedef struct timespec ticks;
 
 static inline ticks getticks(void)