BuildSystem: cmake can now build out libc

I can't seem to get libc++ build to work...

kernel/arch/i386/crt0.S

@@ -0,0 +1,23 @@
+.section .text
+
+.global _start
+_start:
+	# Set up end of the stack frame linked list.
+	movl $0, %ebp
+	pushl %ebp # rip=0
+	pushl %ebp # rbp=0
+	movl %esp, %ebp
+
+	# Prepare signals, memory allocation, stdio and such.
+	call initialize_standard_library
+
+	# Run the global constructors.
+	call _init
+
+	# Run main
+	call main
+
+	# Terminate the process with the exit code.
+	movl %eax, %edi
+	call exit
+.size _start, . - _start