Downcase VMS config names

On VMS, we downcase option names, which means that config names are
downcased as well, so they need to be downcased in the target table to
be found.
Reviewed-by: NRich Salz <rsalz@openssl.org>

Configurations/10-main.conf

@@ -1727,12 +1727,12 @@ sub vc_wince_info {
         #release_aflags   => "/OPTIMIZE/NODEBUG",
         bn_opts          => "SIXTY_FOUR_BIT RC4_INT RC4_CHUNK_LL DES_PTR BF_PTR",
     },
-    "vms-alpha-P32" => {
+    "vms-alpha-p32" => {
 	inherit_from	 => [ "vms-alpha" ],
 	cflags		 => add("/POINTER_SIZE=32"),
 	ex_libs		 => sub { join(",", map { s|SHR([\./])|SHR32$1|g; $_ } @_) },
     },
-    "vms-alpha-P64" => {
+    "vms-alpha-p64" => {
 	inherit_from	 => [ "vms-alpha" ],
 	cflags		 => add("/POINTER_SIZE=64"),
 	ex_libs		 => sub { join(",", map { s|SHR([\./])|SHR64$1|g; $_ } @_) },
@@ -1744,12 +1744,12 @@ sub vc_wince_info {
         #release_aflags   => "/OPTIMIZE/NODEBUG",
         bn_opts          => "SIXTY_FOUR_BIT RC4_INT RC4_CHUNK_LL DES_PTR BF_PTR",
     },
-    "vms-ia64-P32" => {
+    "vms-ia64-p32" => {
 	inherit_from	 => [ "vms-ia64" ],
 	cflags		 => add("/POINTER_SIZE=32"),
 	ex_libs		 => sub { join(",", map { s|SHR([\./])|SHR32$1|g; $_ } @_) },
     },
-    "vms-ia64-P64" => {
+    "vms-ia64-p64" => {
 	inherit_from	 => [ "vms-ia64" ],
 	cflags		 => add("/POINTER_SIZE=64"),
 	ex_libs		 => sub { join(",", map { s|SHR([\./])|SHR64$1|g; $_ } @_) },