Make sure tsget and c_rehash are named with .pl suffix on Windows and VMS

Especially on Windows, the .pl suffix is associated with the perl
interpreter, and therefore make those scripts usable as commands of
their own.  On VMS, it simply looks better.
Reviewed-by: NRich Salz <rsalz@openssl.org>

apps/build.info

-{- use File::Spec::Functions qw/catdir rel2abs/; -}
+{- use File::Spec::Functions qw/catdir rel2abs/;
+   our $tsget_name = $config{target} =~ /^(VC|vms)-/ ? "tsget.pl" : "tsget";
+   "" -}
 IF[{- !$disabled{apps} -}]
   PROGRAMS=openssl
   SOURCE[openssl]=\
@@ -15,7 +17,7 @@ IF[{- !$disabled{apps} -}]
   INCLUDE[openssl]={- rel2abs(catdir($builddir,"../include")) -} .. ../include
   DEPEND[openssl]=../libssl
 
-  SCRIPTS=CA.pl tsget
+  SCRIPTS=CA.pl {- $tsget_name -}
   SOURCE[CA.pl]=CA.pl.in
-  SOURCE[tsget]=tsget.in
+  SOURCE[{- $tsget_name -}]=tsget.in
 ENDIF

tools/build.info

+{- our $c_rehash_name =
+       $config{target} =~ /^(VC|vms)-/ ? "c_rehash.pl" : "c_rehash";
+   "" -}
 IF[{- !$disabled{apps} -}]
-  SCRIPTS=c_rehash
-  SOURCE[c_rehash]=c_rehash.in
+  SCRIPTS={- $c_rehash_name -}
+  SOURCE[{- $c_rehash_name -}]=c_rehash.in
 ENDIF