Fix build failure when using clang for Android

clang for Android generates __gnu_linux__ define, but gcc for Android doesn't.  So we should add check it for Android

diff --git a/src/closures.c b/src/closures.c
index 6298d6f..557c736 100644 (file)
--- a/src/closures.c
+++ b/src/closures.c
@@ -34,7 +34,7 @@
 #include <ffi_common.h>
 
 #if !FFI_MMAP_EXEC_WRIT && !FFI_EXEC_TRAMPOLINE_TABLE
-# if __gnu_linux__
+# if __gnu_linux__ && !defined(__ANDROID__)
 /* This macro indicates it may be forbidden to map anonymous memory
    with both write and execute permission.  Code compiled when this
    option is defined will attempt to map such pages once, but if it