Implement some of the missing LFS64 support.

This gives us:

* <dirent.h>
  struct dirent64
  readdir64, readdir64_r, alphasort64, scandir64

* <fcntl.h>
  creat64, openat64, open64.

* <sys/stat.h>
  struct stat64
  fstat64, fstatat64, lstat64, stat64.

* <sys/statvfs.h>
  struct statvfs64
  statvfs64, fstatvfs64.

* <sys/vfs.h>
  struct statfs64
  statfs64, fstatfs64.

This also removes some of the incorrect #define hacks we've had in the
past (for stat64, for example, which we promised to clean up way back
in bug 8472078).

Bug: 11865851
Bug: 8472078
Change-Id: Ia46443521918519f2dfa64d4621027dfd13ac566
diff --git a/libc/arch-x86_64/syscalls/fstat.S b/libc/arch-x86_64/syscalls/fstat64.S
similarity index 72%
rename from libc/arch-x86_64/syscalls/fstat.S
rename to libc/arch-x86_64/syscalls/fstat64.S
index 35f487d..1a2281b 100644
--- a/libc/arch-x86_64/syscalls/fstat.S
+++ b/libc/arch-x86_64/syscalls/fstat64.S
@@ -2,7 +2,7 @@
 
 #include <private/bionic_asm.h>
 
-ENTRY(fstat)
+ENTRY(fstat64)
     movl    $__NR_fstat, %eax
     syscall
     cmpq    $-MAX_ERRNO, %rax
@@ -13,4 +13,7 @@
     orq     $-1, %rax
 1:
     ret
-END(fstat)
+END(fstat64)
+
+    .globl _C_LABEL(fstat)
+    .equ _C_LABEL(fstat), _C_LABEL(fstat64)
diff --git a/libc/arch-x86_64/syscalls/fstatat.S b/libc/arch-x86_64/syscalls/fstatat64.S
similarity index 72%
rename from libc/arch-x86_64/syscalls/fstatat.S
rename to libc/arch-x86_64/syscalls/fstatat64.S
index c5d79bd..e429ecc 100644
--- a/libc/arch-x86_64/syscalls/fstatat.S
+++ b/libc/arch-x86_64/syscalls/fstatat64.S
@@ -2,7 +2,7 @@
 
 #include <private/bionic_asm.h>
 
-ENTRY(fstatat)
+ENTRY(fstatat64)
     movq    %rcx, %r10
     movl    $__NR_newfstatat, %eax
     syscall
@@ -14,4 +14,7 @@
     orq     $-1, %rax
 1:
     ret
-END(fstatat)
+END(fstatat64)
+
+    .globl _C_LABEL(fstatat)
+    .equ _C_LABEL(fstatat), _C_LABEL(fstatat64)
diff --git a/libc/arch-x86_64/syscalls/fstatfs.S b/libc/arch-x86_64/syscalls/fstatfs64.S
similarity index 70%
rename from libc/arch-x86_64/syscalls/fstatfs.S
rename to libc/arch-x86_64/syscalls/fstatfs64.S
index 59a90fb..fb3685a 100644
--- a/libc/arch-x86_64/syscalls/fstatfs.S
+++ b/libc/arch-x86_64/syscalls/fstatfs64.S
@@ -2,7 +2,7 @@
 
 #include <private/bionic_asm.h>
 
-ENTRY(fstatfs)
+ENTRY(fstatfs64)
     movl    $__NR_fstatfs, %eax
     syscall
     cmpq    $-MAX_ERRNO, %rax
@@ -13,4 +13,7 @@
     orq     $-1, %rax
 1:
     ret
-END(fstatfs)
+END(fstatfs64)
+
+    .globl _C_LABEL(fstatfs)
+    .equ _C_LABEL(fstatfs), _C_LABEL(fstatfs64)
diff --git a/libc/arch-x86_64/syscalls/statfs.S b/libc/arch-x86_64/syscalls/statfs64.S
similarity index 71%
rename from libc/arch-x86_64/syscalls/statfs.S
rename to libc/arch-x86_64/syscalls/statfs64.S
index 8b4b2e5..fd6d54f 100644
--- a/libc/arch-x86_64/syscalls/statfs.S
+++ b/libc/arch-x86_64/syscalls/statfs64.S
@@ -2,7 +2,7 @@
 
 #include <private/bionic_asm.h>
 
-ENTRY(statfs)
+ENTRY(statfs64)
     movl    $__NR_statfs, %eax
     syscall
     cmpq    $-MAX_ERRNO, %rax
@@ -13,4 +13,7 @@
     orq     $-1, %rax
 1:
     ret
-END(statfs)
+END(statfs64)
+
+    .globl _C_LABEL(statfs)
+    .equ _C_LABEL(statfs), _C_LABEL(statfs64)