VMS: OSSL$EXE: needs to reflect that programs are installed in two places

We're installing architecture dependent (compiled) programs in
architecture specific directories, while architecture independent
programs (scripts) get installed in the general programs directory.
OSSL$EXE: reflects that by having two values.
Reviewed-by: NRich Salz <rsalz@openssl.org>

VMS/openssl_startup.com.in

@@ -97,7 +97,8 @@ $	DEFT OSSL$INCLUDE		'INSTALLTOP_'INCLUDE.]
 $	DEF  OSSL$LIB			OSSL$INSTROOT:[LIB.'arch']
 $	DEF  OSSL$SHARE			OSSL$INSTROOT:[LIB.'arch']
 $	DEF  OSSL$ENGINES'sv'		OSSL$INSTROOT:[ENGINES'sv'.'arch']
-$	DEF  OSSL$EXE			OSSL$INSTROOT:[EXE.'arch']
+$	DEF  OSSL$EXE			OSSL$INSTROOT:[EXE.'arch'],-
+					OSSL$INSTROOT:[EXE]
 $	DEF  OSSL$LIBCRYPTO'pz'		OSSL$LIB:OSSL$LIBCRYPTO'pz'.OLB
 $	DEF  OSSL$LIBSSL'pz'		OSSL$LIB:OSSL$LIBSSL'pz'.OLB
 $	DEF  OSSL$LIBCRYPTO'sv'_SHR'pz'	OSSL$SHARE:OSSL$LIBCRYPTO'sv'_SHR'pz'.EXE