[libc] Add missing header for LIBC_INLINE macro

Summray:
Forgot to do this in the last patch

diff --git a/libc/src/__support/CPP/atomic.h b/libc/src/__support/CPP/atomic.h
index f27a26b..b0e90e3 100644 (file)
--- a/libc/src/__support/CPP/atomic.h
+++ b/libc/src/__support/CPP/atomic.h
@@ -9,6 +9,8 @@
 #ifndef LLVM_LIBC_SRC_SUPPORT_CPP_ATOMIC_H
 #define LLVM_LIBC_SRC_SUPPORT_CPP_ATOMIC_H
 
+#include "src/__support/macros/attributes.h"
+
 #include "type_traits.h"
 
 namespace __llvm_libc {