Disable deprecation warnings so that openssl can build.

Author: aardvark179

src/main/c/openssl/extconf.rb

@@ -16,6 +16,8 @@
 if defined?(::TruffleRuby)
   require 'truffle/openssl-prefix'
   dir_config("openssl", ENV["OPENSSL_PREFIX"])
+  # Needed with libssl 3.0.0 and -Werror from building core C extensions
+  $warnflags += ' -Wno-deprecated-declarations'
 else
   dir_config("openssl")
 end

test/truffle/cexts/werror/ext/werror/extconf.rb

@@ -1,4 +1,4 @@
 require 'mkmf'
 # No -pedantic because polyglot-impl.h fails that, and well, it's too pedantic
-$warnflags << ' -W -Wall -Wextra -Werror'
+$warnflags += ' -W -Wall -Wextra -Werror'
 create_makefile('werror')