libhfuzz: add linux functions to libhfuzz.h
diff --git a/libcommon/files.h b/libcommon/files.h
index 22ad386..88408ca 100644
--- a/libcommon/files.h
+++ b/libcommon/files.h
@@ -36,7 +36,8 @@
extern ssize_t files_readFileToBufMax(char *fileName, uint8_t * buf, size_t fileMaxSz);
-extern bool files_writeBufToFile(char *fileName, uint8_t * buf, size_t fileSz, int flags);
+extern bool files_writeBufToFile(const char *fileName, const uint8_t * buf, size_t fileSz,
+ int flags);
extern bool files_writeToFd(int fd, const uint8_t * buf, size_t fileSz);