turn recovery into a C++ binary

Change-Id: I68a67a4c8edec9a74463b3d4766005ce27b51316
diff --git a/mtdutils/mounts.h b/mtdutils/mounts.h
index 30b2927..d721355 100644
--- a/mtdutils/mounts.h
+++ b/mtdutils/mounts.h
@@ -17,6 +17,10 @@
 #ifndef MTDUTILS_MOUNTS_H_
 #define MTDUTILS_MOUNTS_H_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef struct MountedVolume MountedVolume;
 
 int scan_mounted_volumes(void);
@@ -30,4 +34,8 @@
 
 int remount_read_only(const MountedVolume* volume);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif  // MTDUTILS_MOUNTS_H_