fixup! [libc][math][c23] Add f16divf C23 math function

Restore include of "hdr/errno_macros.h".

Author: overmighty

libc/src/__support/FPUtil/generic/CMakeLists.txt

@@ -51,6 +51,7 @@ add_header_library(
   HDRS
     div.h
   DEPENDS
+    libc.hdr.errno_macros
     libc.hdr.fenv_macros
     libc.src.__support.CPP.bit
     libc.src.__support.CPP.type_traits

libc/src/__support/FPUtil/generic/div.h

@@ -9,6 +9,7 @@
 #ifndef LLVM_LIBC_SRC___SUPPORT_FPUTIL_GENERIC_DIV_H
 #define LLVM_LIBC_SRC___SUPPORT_FPUTIL_GENERIC_DIV_H
 
+#include "hdr/errno_macros.h"
 #include "hdr/fenv_macros.h"
 #include "src/__support/CPP/bit.h"
 #include "src/__support/CPP/type_traits.h"