[scudo] Do not include sanitizer_posix.h if not on a Posix platform

Summary:
Move the `sanitizer_posix.h` include within the `SANITIZER_ANDROID` `#if`,
otherwise this errors when built on non-Posix platforms (eg: Fuchsia).

Reviewers: alekseyshl

Reviewed By: alekseyshl

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D38956

llvm-svn: 315917

compiler-rt/lib/scudo/scudo_utils.cpp

@@ -13,8 +13,6 @@
 
 #include "scudo_utils.h"
 
-#include "sanitizer_common/sanitizer_posix.h"
-
 #include <stdarg.h>
 #if defined(__x86_64__) || defined(__i386__)
 # include <cpuid.h>
@@ -23,6 +21,8 @@
 # if SANITIZER_ANDROID && __ANDROID_API__ < 18
 // getauxval() was introduced with API level 18 on Android. Emulate it using
 // /proc/self/auxv for lower API levels.
+#  include "sanitizer_common/sanitizer_posix.h"
+
 #  include <fcntl.h>
 
 #  define AT_HWCAP 16