Compile for android. Probably needs a bunch of work to run, but it's a step in a direction.

git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@4087 ed5197a5-7fde-0310-b194-c3ffbd925b24

src/task.c

@@ -29,7 +29,9 @@
 #include <backtrace.h>
 
 #ifndef _WIN32
+#ifndef __ANDROID__
 #include <execinfo.h>
+#endif
 #include <unistd.h>
 #endif
 
@@ -1147,7 +1149,7 @@ JSValue tf_task_allocate_promise(tf_task_t* task, promiseid_t* out_promise)
 #ifdef _WIN32
 	count = CaptureStackBackTrace(0, sizeof(buffer) / sizeof(*buffer), buffer, NULL);
 	stack_hash = fnv32a((const void*)buffer, sizeof(void*) * count, stack_hash);
-#else
+#elif !defined(__ANDROID__)
 	count = backtrace(buffer, sizeof(buffer) / sizeof(*buffer));
 	stack_hash = fnv32a((const void*)buffer, sizeof(void*) * count, stack_hash);
 #endif