Cleanup transitive includes in the legacy inlines.

We don't want to be exposing so much through the headers for the
implementation details unless we have to.

Test: make checkbuild
Bug: None
Change-Id: Ieca9cd8106725e08887a3e9fde60d1eef64ef98b
diff --git a/libc/include/android/legacy_fenv_inlines_mips.h b/libc/include/android/legacy_fenv_inlines_mips.h
index 10b93c0..43ad360 100644
--- a/libc/include/android/legacy_fenv_inlines_mips.h
+++ b/libc/include/android/legacy_fenv_inlines_mips.h
@@ -29,10 +29,12 @@
 #ifndef ANDROID_LEGACY_FENV_INLINES_MIPS_H
 #define ANDROID_LEGACY_FENV_INLINES_MIPS_H
 
-#include <fenv.h>
+#include <sys/cdefs.h>
 
 #if __ANDROID_API__ < __ANDROID_API_L__ && (defined(__mips__) && !defined(__LP64__))
 
+#include <fenv.h>
+
 __BEGIN_DECLS
 
 #define FCSR_CAUSE_SHIFT 10