Replaced builtin store function with a new syntax

lib/mem/alloc_unix.q

@@ -7,6 +7,6 @@ alloc(length int) -> []byte {
 		return x
 	}
 
-	store(x, 8, length)
+	[x] = length
 	return x + 8
 }

lib/mem/alloc_windows.q

@@ -5,7 +5,7 @@ alloc(length int) -> []byte {
 		return x
 	}
 
-	store(x, 8, length)
+	[x] = length
 	return x + 8
 }
 

lib/thread/thread_linux.q

@@ -4,9 +4,9 @@ import sys
 create(func *any) -> int {
 	stack := sys.mmap(0, 4096, 0x1|0x2, 0x02|0x20|0x100)
 	stack += 4096 - 8
-	store(stack, 8, core.exit)
+	[stack] = core.exit
 	stack -= 8
-	store(stack, 8, func)
+	[stack] = func
 	return sys.clone(clone.vm|clone.fs|clone.files|clone.sighand|clone.parent|clone.thread|clone.io, stack, 0, 0, 0)
 }