BuildSystem: Move all userpace libraries under the userspace directory

As the number of libraries is increasing, root directory starts to
expand. This adds better organization for libraries

userspace/libraries/LibC/arch/i686/crt0.S

@@ -0,0 +1,34 @@
+.section .text
+
+.global _start
+_start:
+	pushl $0
+	pushl %edi
+	pushl %esi
+	pushl %edx
+
+	# STACK LAYOUT
+	#   null
+	#   argc
+	#   argv
+	#   envp
+
+	xorl %ebp, %ebp
+
+	# init libc (envp already as argument)
+	call _init_libc
+
+	# call global constructors
+	call _init
+
+	# call main
+	movl 0(%esp), %eax
+	xchgl %eax, 8(%esp)
+	movl %eax, (%esp)
+	call main
+
+	subl $12, %esp
+	pushl %eax
+	call exit
+
+.size _start, . - _start