Remove dependencies on obsolete __ARCH_WANT_SYSCALL_NO_FLAGS syscalls.

(aarch64 kernels only have the newer system calls.)

Also expose the new functionality that's exposed by glibc in our header files.

Change-Id: I45d2d168a03f88723d1f7fbf634701006a4843c5

libc/arch-x86_64/syscalls/dup3.S

@@ -4,8 +4,8 @@
 #include <linux/err.h>
 #include <machine/asm.h>
 
-ENTRY(dup2)
-    movl    $__NR_dup2, %eax
+ENTRY(dup3)
+    movl    $__NR_dup3, %eax
     syscall
     cmpq    $-MAX_ERRNO, %rax
     jb      1f
@@ -15,4 +15,4 @@ ENTRY(dup2)
     orq     $-1, %rax
 1:
     ret
-END(dup2)
+END(dup3)

libc/arch-x86_64/syscalls/epoll_create1.S

@@ -4,8 +4,8 @@
 #include <linux/err.h>
 #include <machine/asm.h>
 
-ENTRY(epoll_create)
-    movl    $__NR_epoll_create, %eax
+ENTRY(epoll_create1)
+    movl    $__NR_epoll_create1, %eax
     syscall
     cmpq    $-MAX_ERRNO, %rax
     jb      1f
@@ -15,4 +15,4 @@ ENTRY(epoll_create)
     orq     $-1, %rax
 1:
     ret
-END(epoll_create)
+END(epoll_create1)

libc/arch-x86_64/syscalls/inotify_init1.S

@@ -4,8 +4,8 @@
 #include <linux/err.h>
 #include <machine/asm.h>
 
-ENTRY(inotify_init)
-    movl    $__NR_inotify_init, %eax
+ENTRY(inotify_init1)
+    movl    $__NR_inotify_init1, %eax
     syscall
     cmpq    $-MAX_ERRNO, %rax
     jb      1f
@@ -15,4 +15,4 @@ ENTRY(inotify_init)
     orq     $-1, %rax
 1:
     ret
-END(inotify_init)
+END(inotify_init1)

libc/arch-x86_64/syscalls/pipe.S

@@ -1,18 +0,0 @@
-/* Generated by gensyscalls.py. Do not edit. */
-
-#include <asm/unistd.h>
-#include <linux/err.h>
-#include <machine/asm.h>
-
-ENTRY(pipe)
-    movl    $__NR_pipe, %eax
-    syscall
-    cmpq    $-MAX_ERRNO, %rax
-    jb      1f
-    negl    %eax
-    movl    %eax, %edi
-    call    __set_errno
-    orq     $-1, %rax
-1:
-    ret
-END(pipe)