Reland "Cleanup transitive includes in the legacy inlines."

This reverts commit 54c71521b5295f82aaac7aa2f3ce918298fed70f.

Bug: None
Test: make checkbuild
Change-Id: Ica6a4f7ecadfcc854160a60a5db1b44ae3b6c821
diff --git a/libc/include/android/legacy_sys_mman_inlines.h b/libc/include/android/legacy_sys_mman_inlines.h
index 7eb537e..160e6fe 100644
--- a/libc/include/android/legacy_sys_mman_inlines.h
+++ b/libc/include/android/legacy_sys_mman_inlines.h
@@ -29,12 +29,13 @@
 #pragma once
 
 #include <sys/cdefs.h>
-#include <sys/mman.h>
-#include <sys/syscall.h>
-#include <unistd.h>
 
 #if __ANDROID_API__ < __ANDROID_API_L__
 
+#include <errno.h>
+#include <sys/mman.h>
+#include <unistd.h>
+
 __BEGIN_DECLS
 
 /*