libkmod: Move finit_module() definition to missing.h
Check for finit_module() and don't use our own static inline function if
there's such function in libc (or another lib).
In testsuite we need to unconditionally define HAVE_FINIT_MODULE because
we want to override this function, and never use the static inline one
in missing.h
diff --git a/configure.ac b/configure.ac
index 1c6c793..066515c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -40,6 +40,7 @@
AC_CHECK_FUNCS_ONCE(__xstat)
AC_CHECK_FUNCS_ONCE([__secure_getenv secure_getenv])
+AC_CHECK_FUNCS_ONCE([finit_module])
# dietlibc doesn't have st.st_mtim struct member
AC_CHECK_MEMBERS([struct stat.st_mtim], [], [], [#include <sys/stat.h>])
