Ports: Bump Zig version to 0.11.0-dev.4003+c6aa29b6f

This commit fixes the build for LLVM 16 now that the toolchain has been
updated, and updates us to the latest available Zig commit.

The main patch changes are making more symbols available (and exposing
them through std.c.serenity) and working around new Zig build
requirements.

Co-Authored-By: Andre Herbst <moormaster@gmx.net>

Ports/zig/scripts/constants.txt

@@ -149,10 +149,64 @@ PROT_EXEC
 PROT_NONE
 PROT_READ
 PROT_WRITE
+PTHREAD_STACK_MIN
 R_OK
 SEEK_CUR
 SEEK_END
 SEEK_SET
+SIGABRT
+SIGALRM
+SIGBUS
+SIGCANCEL
+SIGCHLD
+SIGCONT
+SIGFPE
+SIGHUP
+SIGILL
+SIGINFO
+SIGINT
+SIGINVAL
+SIGIO
+SIGKILL
+SIGPIPE
+SIGPROF
+SIGQUIT
+SIGSEGV
+SIGSTKFLT
+SIGSTOP
+SIGSYS
+SIGTERM
+SIGTRAP
+SIGTSTP
+SIGTTIN
+SIGTTOU
+SIGURG
+SIGUSR1
+SIGUSR2
+SIGVTALRM
+SIGWINCH
+SIGXCPU
+SIGXFSZ
+SOL_SOCKET
+SO_ACCEPTCONN
+SO_BINDTODEVICE
+SO_BROADCAST
+SO_DEBUG
+SO_DONTROUTE
+SO_ERROR
+SO_KEEPALIVE
+SO_LINGER
+SO_OOBINLINE
+SO_PEERCRED
+SO_RCVBUF
+SO_RCVLOWAT
+SO_RCVTIMEO
+SO_REUSEADDR
+SO_SNDBUF
+SO_SNDLOWAT
+SO_SNDTIMEO
+SO_TIMESTAMP
+SO_TYPE
 STDERR_FILENO
 STDIN_FILENO
 STDOUT_FILENO