Modify MIPS64 stat structure to match a generic one in AOSP.

The kernel version of the stat structure is used during the syscalls. After the syscall,
the kernel stat structure is converted to match the generic one. Eventually we would like
the generic stat structure and related syscalls be added to MIPS64 kernel, removing the
thunks added to AOSP.

Change-Id: I7764e80278c1cc8254754c3531ec2dda7544a8ec
diff --git a/libc/SYSCALLS.TXT b/libc/SYSCALLS.TXT
index a648c9f..0fa2a1e 100644
--- a/libc/SYSCALLS.TXT
+++ b/libc/SYSCALLS.TXT
@@ -134,7 +134,7 @@
 int fchmodat(int, const char*, mode_t, int)  all
 int fchownat(int, const char*, uid_t, gid_t, int)  all
 int fstatat64|fstatat:fstatat64(int, const char*, struct stat*, int)   arm,mips,x86
-int fstatat64|fstatat:newfstatat(int, const char*, struct stat*, int)  arm64,mips64,x86_64
+int fstatat64|fstatat:newfstatat(int, const char*, struct stat*, int)  arm64,x86_64
 int linkat(int, const char*, int, const char*, int)  all
 int mkdirat(int, const char*, mode_t)  all
 int mknodat(int, const char*, mode_t, dev_t)  all
@@ -179,7 +179,7 @@
 int statfs64|statfs:statfs(const char*, struct statfs*)  arm64,mips64,x86_64
 
 int     fstat64|fstat:fstat64(int, struct stat*)    arm,mips,x86
-int     fstat64|fstat:fstat(int, struct stat*)    arm64,mips64,x86_64
+int     fstat64|fstat:fstat(int, struct stat*)    arm64,x86_64
 
 # file system
 int     chdir(const char*)              all