tools: ublimage: Fix memory leak in parse_cfg_file()

Dynamic memory, referenced by 'line', is allocated at ublimage.c:159
by calling function 'getline' and lost at ublimage.c:184.

Signed-off-by: Maks Mishin <maks.mishinFZ@gmail.com>

tools/ublimage.c

@@ -178,6 +178,7 @@ static uint32_t parse_cfg_file(struct ubl_header *ublhdr, char *name)
 					lineno, fld, &dcd_len);
 		}
 	}
+	free(line);
 	fclose(fd);
 
 	return dcd_len;