rust: cbindgen first verifies existing bindings

So as not to recompile every C file inclusing rust.h

rust/Makefile.am

@@ -81,9 +81,8 @@ vendor:
 
 if HAVE_CBINDGEN
 gen/rust-bindings.h: $(RUST_SURICATA_LIB)
-	rm -f gen/rust-bindings.h
 	cbindgen --config $(abs_top_srcdir)/rust/cbindgen.toml \
-		--quiet --output $(abs_top_builddir)/rust/gen/rust-bindings.h
+		--quiet --verify --output $(abs_top_builddir)/rust/gen/rust-bindings.h || true
 else
 gen/rust-bindings.h:
 endif

src/Makefile.am

@@ -1267,7 +1267,7 @@ suricata_SOURCES = main.c
 # the library search path.
 suricata_LDFLAGS = $(all_libraries) ${SECLDFLAGS}
 suricata_LDADD = libsuricata_c.a $(RUST_SURICATA_LIB) $(HTP_LDADD) $(RUST_LDADD)
-suricata_DEPENDENCIES = libsuricata_c.a
+suricata_DEPENDENCIES = libsuricata_c.a $(RUST_SURICATA_LIB)
 
 if BUILD_SHARED_LIBRARY
 libsuricata.so.$(VERSION): libsuricata_c.a