Harmonize s390x assembler modules with "catch-all" rules from commit#19749.

crypto/aes/asm/aes-s390x.pl

@@ -50,6 +50,9 @@
 # it was measured to be ~6.6x. It's less than previously mentioned 8x,
 # because software implementation was optimized.
 
+while (($output=shift) && ($output!~/^\w[\w\-]*\.\w+$/)) {}
+open STDOUT,">$output";
+
 $softonly=0;	# allow hardware support
 
 $t0="%r0";	$mask="%r0";
@@ -1337,3 +1340,4 @@ ___
 
 $code =~ s/\`([^\`]*)\`/eval $1/gem;
 print $code;
+close STDOUT;	# force flush

crypto/bn/asm/s390x-mont.pl

@@ -32,6 +32,9 @@
 # Reschedule to minimize/avoid Address Generation Interlock hazard,
 # make inner loops counter-based.
 
+while (($output=shift) && ($output!~/^\w[\w\-]*\.\w+$/)) {}
+open STDOUT,">$output";
+
 $mn0="%r0";
 $num="%r1";
 

crypto/sha/asm/sha1-s390x.pl

@@ -23,7 +23,7 @@
 
 $kimdfunc=1;	# magic function code for kimd instruction
 
-$output=shift;
+while (($output=shift) && ($output!~/^\w[\w\-]*\.\w+$/)) {}
 open STDOUT,">$output";
 
 $K_00_39="%r0"; $K=$K_00_39;

crypto/sha/asm/sha512-s390x.pl

@@ -44,7 +44,7 @@ $tbl="%r13";
 $T1="%r14";
 $sp="%r15";
 
-$output=shift;
+while (($output=shift) && ($output!~/^\w[\w\-]*\.\w+$/)) {}
 open STDOUT,">$output";
 
 if ($output =~ /512/) {