Fix warnings

This change fixes Cosmopolitan so it has fewer opinions about compiler
warnings. The whole repository had to be cleaned up to be buildable in
-Werror -Wall mode. This lets us benefit from things like strict const
checking. Some actual bugs might have been caught too.

libc/log/attachdebugger.c

@@ -94,18 +94,18 @@ relegated int(AttachDebugger)(intptr_t continuetoaddr) {
     sys_dup2(ttyfd, 1, 0);
     __sys_execve(gdb,
                  (char *const[]){
-                     "gdb",    "--tui",
-                     "-p",     pidstr,
-                     se,       elf,
-                     "-ex",    "set osabi GNU/Linux",
-                     "-ex",    "set complaints 0",
-                     "-ex",    "set confirm off",
-                     "-ex",    layout,
-                     "-ex",    "layout reg",
-                     "-ex",    "set var g_gdbsync = 1",
-                     "-q",     rewind,
-                     breakcmd, "-ex",
-                     "c",      NULL,
+                     "gdb",      "--tui",
+                     "-p",       pidstr,
+                     (char *)se, (char *)elf,
+                     "-ex",      "set osabi GNU/Linux",
+                     "-ex",      "set complaints 0",
+                     "-ex",      "set confirm off",
+                     "-ex",      (char *)layout,
+                     "-ex",      "layout reg",
+                     "-ex",      "set var g_gdbsync = 1",
+                     "-q",       (char *)rewind,
+                     breakcmd,   "-ex",
+                     "c",        NULL,
                  },
                  environ);
     abort();