Storable 3.05_14: fix build error with perlbrew

stacksize may exit with 13, try to fix the readonly stacksize.h
and ignore the exit code, as the next line makes it again.
Closes #335.

Author: rurban

Makefile.SH

@@ -1201,7 +1201,7 @@ uni.data: $(MINIPERL_EXE) $(CONFIGPM) lib/unicore/mktables $(nonxs_ext)
 $spitshell >>$Makefile <<!GROK!THIS!
 
 rebuild_storable: \$(PERL_EXE) $cwd_dep
-	\$(RUN_PERL) dist/Storable/stacksize --core
+	-\$(RUN_PERL) dist/Storable/stacksize --core
 	\$(MAKE) -C dist/Storable PERL_CORE=1
 
 !GROK!THIS!

dist/Storable/ChangeLog

@@ -1,3 +1,9 @@
+2017-10-15 13:57:00 rurban
+    Version 3.05_14
+
+        * perlbrew fix: try to fix the readonly stacksize.h
+        [cperl #335]
+
 2017-07-24 13:57:13 rurban
     Version 3.05_13
 

dist/Storable/Storable.pm

@@ -26,7 +26,7 @@ package Storable; @ISA = qw(Exporter);
 
 use vars qw($canonical $forgive_me $VERSION $XS_VERSION);
 
-$VERSION = '3.05_13';
+$VERSION = '3.05_14';
 $XS_VERSION = $VERSION;
 $VERSION = eval $VERSION;
 

dist/Storable/stacksize

@@ -174,6 +174,7 @@ if ($max_depth == $bad1-1
 print "MAX_DEPTH_HASH = $n\n" unless QUIET;
 my $max_depth_hash = $n;
 
+chmod 0644, $fn if -e $fn && !-w $fn;
 open $f, ">", $fn or die "$fn $!";
 print $f "/* bisected with stacksize.pl */\n";
 print $f "#define PST_STACK_MAX_DEPTH	$max_depth\n";