VMS: ensure crypto/getenv.c is included in the build

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7665)

crypto/crypto-lib.com

@@ -214,7 +214,8 @@ $! The contents of these variables are copied from the LIBOBJ variable in the
 $! corresponding Makefile from each corresponding subdirectory, with .o stripped
 $! and spaces replaced with commas.
 $ LIB_ = "cryptlib,mem,mem_dbg,cversion,ex_data,cpt_err,ebcdic,"+ -
-	"uid,o_time,o_str,o_dir,o_fips,o_init,fips_ers,mem_clr"
+	"uid,o_time,o_str,o_dir,o_fips,o_init,fips_ers,mem_clr,"+ -
+	"getenv"
 $ LIB_OBJECTS = "o_names,obj_dat,obj_lib,obj_err,obj_xref"
 $ LIB_MD2 = "md2_dgst,md2_one"
 $ LIB_MD4 = "md4_dgst,md4_one"