Add support for sys_mmap MIPS64 N64

Add missing support for mmap system call for MIPS64 N64 ABI.

TEST= build breakpad's src/common/linux/memory_mapped_file.cc for MIPS64
R=mseaborn@chromium.org

Review URL: https://codereview.chromium.org/1096093003

git-svn-id: http://linux-syscall-support.googlecode.com/svn/trunk/lss@35 829466d3-f3f5-3ae4-62ad-de35cf9bba21
diff --git a/linux_syscall_support.h b/linux_syscall_support.h
index d09e3a0..a143fc2 100644
--- a/linux_syscall_support.h
+++ b/linux_syscall_support.h
@@ -3880,6 +3880,8 @@
                          loff_t,         o)
     LSS_INLINE _syscall3(int,     readahead,      int,         f,
                          loff_t,         o, unsigned, c)
+    LSS_INLINE _syscall6(void *, mmap, void *, addr, size_t, length, int, prot,
+                         int, flags, int, fd, int64_t, offset)
   #else
     #define __NR__pread64   __NR_pread64
     #define __NR__pwrite64  __NR_pwrite64