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-mips/syscalls/fstat.S b/libc/arch-mips/syscalls/fstat64.S
similarity index 67%
rename from libc/arch-mips/syscalls/fstat.S
rename to libc/arch-mips/syscalls/fstat64.S
index 77eabf8..de09df5 100644
--- a/libc/arch-mips/syscalls/fstat.S
+++ b/libc/arch-mips/syscalls/fstat64.S
@@ -2,11 +2,11 @@
 
 #include <asm/unistd.h>
     .text
-    .globl fstat
+    .globl fstat64
     .align 4
-    .ent fstat
+    .ent fstat64
 
-fstat:
+fstat64:
     .set noreorder
     .cpload $t9
     li $v0, __NR_fstat64
@@ -20,4 +20,7 @@
     j $t9
     nop
     .set reorder
-    .end fstat
+    .end fstat64
+
+    .globl _C_LABEL(fstat)
+    .equ _C_LABEL(fstat), _C_LABEL(fstat64)
diff --git a/libc/arch-mips/syscalls/fstatat.S b/libc/arch-mips/syscalls/fstatat64.S
similarity index 65%
rename from libc/arch-mips/syscalls/fstatat.S
rename to libc/arch-mips/syscalls/fstatat64.S
index 478f099..b177922 100644
--- a/libc/arch-mips/syscalls/fstatat.S
+++ b/libc/arch-mips/syscalls/fstatat64.S
@@ -2,11 +2,11 @@
 
 #include <asm/unistd.h>
     .text
-    .globl fstatat
+    .globl fstatat64
     .align 4
-    .ent fstatat
+    .ent fstatat64
 
-fstatat:
+fstatat64:
     .set noreorder
     .cpload $t9
     li $v0, __NR_fstatat64
@@ -20,4 +20,7 @@
     j $t9
     nop
     .set reorder
-    .end fstatat
+    .end fstatat64
+
+    .globl _C_LABEL(fstatat)
+    .equ _C_LABEL(fstatat), _C_LABEL(fstatat64)