[glibc/maskray/relr] Fix compiler issue with mmap_internal

[Fangrui Song]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=6446c725d4df7d1a13fcf09be43975b263ad5b3d

commit 6446c725d4df7d1a13fcf09be43975b263ad5b3d
Author: Stafford Horne <shorne@gmail.com>
Date:   Fri Oct 29 06:27:17 2021 +0900

    Fix compiler issue with mmap_internal
    
    Compiling mmap_internal fails to compile when we use -1 for MMAP2_PAGE_UNIT
    on 32 bit architectures.  The error is as follows:
    
        ../sysdeps/unix/sysv/linux/mmap_internal.h:30:8: error: unknown type
        name 'uint64_t'
        |
           30 | static uint64_t page_unit;
              |
              |        ^~~~~~~~
    
    Fix by adding including stdint.h.

Diff:
---
 sysdeps/unix/sysv/linux/mmap_internal.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sysdeps/unix/sysv/linux/mmap_internal.h b/sysdeps/unix/sysv/linux/mmap_internal.h
index 5ca6976191..35e112cc77 100644
--- a/sysdeps/unix/sysv/linux/mmap_internal.h
+++ b/sysdeps/unix/sysv/linux/mmap_internal.h
@@ -19,6 +19,8 @@
 #ifndef MMAP_INTERNAL_LINUX_H
 #define MMAP_INTERNAL_LINUX_H 1
 
+#include <stdint.h>
+
 /* This is the minimum mmap2 unit size accept by the kernel.  An architecture
    with multiple minimum page sizes (such as m68k) might define it as -1 and
    thus it will queried at runtime.  */