Generate a dictionary of OIDs for fuzzers

It turns out that (some?) fuzzers can read a dictionary of OIDs,
so we generate one as part of the usual 'make update'.

Fixes #4615

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Kurt Roeckx <kurt@roeckx.be>
(Merged from https://github.com/openssl/openssl/pull/4637)

Configurations/unix-Makefile.tmpl

diff --git a/Configurations/unix-Makefile.tmpl b/Configurations/unix-Makefile.tmpl
index c9553cf..617d3b9 100644
--- a/Configurations/unix-Makefile.tmpl
+++ b/Configurations/unix-Makefile.tmpl
@@ -612,7 +612,7 @@
 update: generate errors ordinals
 
 generate: generate_apps generate_crypto_bn generate_crypto_objects \
-          generate_crypto_conf generate_crypto_asn1
+          generate_crypto_conf generate_crypto_asn1 generate_fuzz_oids
 
 doc-nits:
 	(cd $(SRCDIR); $(PERL) util/find-doc-nits -n -p ) >doc-nits
@@ -653,6 +653,11 @@
 	( cd $(SRCDIR); $(PERL) crypto/asn1/charmap.pl \
 			        > crypto/asn1/charmap.h )
 
+generate_fuzz_oids:
+	( cd $(SRCDIR); $(PERL) fuzz/mkfuzzoids.pl \
+				crypto/objects/obj_dat.h \
+				> fuzz/oids.txt )
+
 # Set to -force to force a rebuild
 ERROR_REBUILD=
 errors: