Changed multi-line C comments into another style.

The left side doesn't look unbalanced.

src/ar65/library.h

@@ -61,22 +61,22 @@ extern const char* LibName;
 
 void LibOpen (const char* Name, int MustExist, int NeedTemp);
 /* Open an existing library and a temporary copy. If MustExist is true, the
- * old library is expected to exist. If NeedTemp is true, a temporary library
- * is created.
- */
+** old library is expected to exist. If NeedTemp is true, a temporary library
+** is created.
+*/
 
 unsigned long LibCopyTo (FILE* F, unsigned long Bytes);
 /* Copy data from F to the temp library file, return the start position in
- * the temporary library file.
- */
+** the temporary library file.
+*/
 
 void LibCopyFrom (unsigned long Pos, unsigned long Bytes, FILE* F);
 /* Copy data from the library file into another file */
 
 void LibClose (void);
 /* Write remaining data, close both files and copy the temp file to the old
- * filename
- */
+** filename
+*/