fixup! Fix build failures

This reverts a part of commit 866aa08,
as it's no longer necessary after the previous two commits.

Author: kleisauke

system/lib/libc/musl/arch/emscripten/syscall_arch.h

@@ -49,7 +49,7 @@ int __syscall_uname(struct utsname *buf);
 int __syscall_mprotect(size_t start, size_t len, int prot);
 pid_t __syscall_getpgid(pid_t pid);
 int __syscall_fchdir(int fd);
-int __syscall__newselect(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, void *timeout);
+int __syscall__newselect(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout);
 int __syscall_msync(void *addr, size_t len, int flags);
 pid_t __syscall_getsid(pid_t pid);
 int __syscall_fdatasync(int fd);
@@ -99,7 +99,7 @@ int __syscall_symlinkat(const char *target, int newdirfd, const char *linkpath);
 int __syscall_readlinkat(int dirfd, const char *path, char *buf, size_t bufsize);
 int __syscall_fchmodat2(int dirfd, const char *path, mode_t mode, int flags);
 int __syscall_faccessat(int dirfd, const char *path, int amode, int flags);
-int __syscall_pselect6(int nfds, fd_set *rfds, fd_set *wfds, fd_set *efds, const void *ts, const void *mask);
+int __syscall_pselect6(int nfds, fd_set *rfds, fd_set *wfds, fd_set *efds, const struct timespec *ts, const void *mask);
 int __syscall_utimensat(int dirfd, const char *path, const struct timespec times[2], int flags);
 int __syscall_fallocate(int fd, int mode, off_t offset, off_t len);
 int __syscall_dup3(int oldfd, int newfd, int flags);