Ports: Add luajit port

Ports/luajit/patches/0001-Recognize-Serenity-as-POSIX.patch

@@ -0,0 +1,25 @@
+From 514ea84845d1cff0c274ac5e278c0a783d63032f Mon Sep 17 00:00:00 2001
+From: circl <circl.lastname@gmail.com>
+Date: Sat, 19 Mar 2022 20:05:26 +0100
+Subject: [PATCH 1/2] Recognize Serenity as POSIX
+
+---
+ src/lj_arch.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/lj_arch.h b/src/lj_arch.h
+index c8d7138..ba7be19 100644
+--- a/src/lj_arch.h
++++ b/src/lj_arch.h
+@@ -74,7 +74,7 @@
+        defined(__NetBSD__) || defined(__OpenBSD__) || \
+        defined(__DragonFly__)) && !defined(__ORBIS__)
+ #define LUAJIT_OS	LUAJIT_OS_BSD
+-#elif (defined(__sun__) && defined(__svr4__)) || defined(__HAIKU__)
++#elif (defined(__sun__) && defined(__svr4__)) || defined(__HAIKU__) || defined(__serenity__)
+ #define LUAJIT_OS	LUAJIT_OS_POSIX
+ #elif defined(__CYGWIN__)
+ #define LJ_TARGET_CYGWIN	1
+-- 
+2.32.0
+

Ports/luajit/patches/0002-Serenity-doesn-t-have-setitimer.patch

@@ -0,0 +1,26 @@
+From a8fd0e7a0e83e768acb4503ba06b19875c2b03ab Mon Sep 17 00:00:00 2001
+From: circl <circl.lastname@gmail.com>
+Date: Sat, 19 Mar 2022 20:07:39 +0100
+Subject: [PATCH 2/2] Serenity doesn't have setitimer
+
+---
+ src/lj_arch.h | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/src/lj_arch.h b/src/lj_arch.h
+index ba7be19..0bd7b1b 100644
+--- a/src/lj_arch.h
++++ b/src/lj_arch.h
+@@ -490,6 +490,9 @@
+ #define LJ_HASFFI		1
+ #endif
+ 
++// FIXME: Disabled due to lack of setitimer
++#define LUAJIT_DISABLE_PROFILE
++
+ #if defined(LUAJIT_DISABLE_PROFILE)
+ #define LJ_HASPROFILE		0
+ #elif LJ_TARGET_POSIX
+-- 
+2.32.0
+

Ports/luajit/patches/ReadMe.md

@@ -0,0 +1,12 @@
+# Patches for luajit on SerenityOS
+
+## `0001-Recognize-Serenity-as-POSIX.patch`
+
+Recognize Serenity as POSIX
+
+
+## `0002-Serenity-doesn-t-have-setitimer.patch`
+
+Serenity doesn't have setitimer
+
+