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

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

@@ -0,0 +1,16 @@
+/* i686 crti.s */
+.section .init
+.global _init
+.type _init, @function
+_init:
+	pushl %ebp
+	movl %esp, %ebp
+	/* gcc will nicely put the contents of crtbegin.o's .init section here. */
+
+.section .fini
+.global _fini
+.type _fini, @function
+_fini:
+	pushl %ebp
+	movl %esp, %ebp
+	/* gcc will nicely put the contents of crtbegin.o's .fini section here. */

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

@@ -0,0 +1,10 @@
+/* i686 crtn.s */
+.section .init
+	/* gcc will nicely put the contents of crtend.o's .init section here. */
+	popl %ebp
+	ret
+
+.section .fini
+	/* gcc will nicely put the contents of crtend.o's .fini section here. */
+	popl %ebp
+	ret

userspace/libraries/LibC/arch/x86_64/crt0.S

@@ -0,0 +1,35 @@
+.section .text
+
+.global _start
+_start:
+	pushq $0
+	pushq %rdi
+	pushq %rsi
+	pushq %rdx
+
+	# STACK LAYOUT
+	#   null
+	#   argc
+	#   argv
+	#   envp
+
+	xorq %rbp, %rbp
+
+	# init libc
+	movq 0(%rsp), %rdi
+	call _init_libc
+
+	# call global constructors
+	call _init
+
+	# call main
+	movq 16(%rsp), %rdi
+	movq  8(%rsp), %rsi
+	movq  0(%rsp), %rdx
+	call main
+
+	# call exit
+	movq %rax, %rdi
+	call exit
+
+.size _start, . - _start

userspace/libraries/LibC/arch/x86_64/crti.S

@@ -0,0 +1,16 @@
+/* x86-64 crti.s */
+.section .init
+.global _init
+.type _init, @function
+_init:
+	pushq %rbp
+	movq %rsp, %rbp
+	/* gcc will nicely put the contents of crtbegin.o's .init section here. */
+
+.section .fini
+.global _fini
+.type _fini, @function
+_fini:
+	pushq %rbp
+	movq %rsp, %rbp
+	/* gcc will nicely put the contents of crtbegin.o's .fini section here. */

userspace/libraries/LibC/arch/x86_64/crtn.S

@@ -0,0 +1,10 @@
+/* x86-64 crtn.s */
+.section .init
+	/* gcc will nicely put the contents of crtend.o's .init section here. */
+	popq %rbp
+	ret
+
+.section .fini
+	/* gcc will nicely put the contents of crtend.o's .fini section here. */
+	popq %rbp
+	ret