Switch minadb over to C++.

Change-Id: I5afaf70caa590525627c676c88b445d3162de33e
diff --git a/fuse_sdcard_provider.h b/fuse_sdcard_provider.h
index dc2982c..dbfbcd5 100644
--- a/fuse_sdcard_provider.h
+++ b/fuse_sdcard_provider.h
@@ -17,7 +17,13 @@
 #ifndef __FUSE_SDCARD_PROVIDER_H
 #define __FUSE_SDCARD_PROVIDER_H
 
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
 void* start_sdcard_fuse(const char* path);
 void finish_sdcard_fuse(void* token);
 
+__END_DECLS
+
 #endif