rust/derive: add Makefile for Cargo.toml regeneration

To automatically update Cargo.toml when Cargo.toml.in is updated.

configure.ac

@@ -2565,7 +2565,8 @@ AC_SUBST(RUST_SURICATA_LIBNAME)
 
 AM_CONDITIONAL([BUILD_SHARED_LIBRARY], [test "x$enable_shared" = "xyes"] && [test "x$can_build_shared_library" = "xyes"])
 
-AC_CONFIG_FILES(Makefile src/Makefile rust/Makefile rust/Cargo.lock rust/Cargo.toml rust/derive/Cargo.toml rust/.cargo/config.toml)
+AC_CONFIG_FILES(Makefile src/Makefile rust/Makefile rust/Cargo.lock rust/Cargo.toml rust/.cargo/config.toml)
+AC_CONFIG_FILES(rust/derive/Makefile rust/derive/Cargo.toml)
 AC_CONFIG_FILES(rust/sys/Makefile rust/sys/Cargo.toml)
 AC_CONFIG_FILES(rust/ffi/Makefile rust/ffi/Cargo.toml)
 AC_CONFIG_FILES(rust/suricatactl/Makefile rust/suricatactl/Cargo.toml)

rust/Makefile.am

@@ -1,4 +1,5 @@
-SUBDIRS =	ffi \
+SUBDIRS =	derive \
+		ffi \
 		htp \
 		sys \
 		suricatasc \

rust/derive/Makefile.am

@@ -0,0 +1,3 @@
+EXTRA_DIST =	Cargo.toml
+
+all-local: Cargo.toml