Create current list of persistent read/write attributes each build

Modified xmltohb.pl to output a list of persistent read/write
attributes to a file named rwAttrList.csv in obj/genfiles.

Change-Id: I7f17a709891f9742c9e4943174c0fd7a023ed940
RTC:163084
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/41536
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Reviewed-by: Stephen M. Cprek <smcprek@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Michael Baiocchi <mbaiocch@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
Reviewed-by: Nicholas E. Bofferding <bofferdn@us.ibm.com>

src/usr/targeting/common/xmltohb/xmltohb.pl

@@ -249,6 +249,33 @@
     handleTgtPtrAttributesHb(\$attributes, \%Target_t);
 }
 
+# Output R/W attributes
+my $rwAttrOutputDir = "";
+if (!($cfgSrcOutputDir =~ "none"))
+{
+    $rwAttrOutputDir = $cfgSrcOutputDir;
+}
+open(my $rwAttrFile, ">$rwAttrOutputDir"."PersistRwAttrList.csv")
+      or croak("R/W data file 'PersistRwAttrList.csv' could not be opened.");
+
+print $rwAttrFile "# PersistRwAttrList.csv\n"
+. "# This file is generated by perl script xmltohb.pl\n"
+. "# It lists all non-volatile read/write attributes that persist in PNOR\n"
+. "# and can be manipulated at will.\n";
+
+foreach my $attrs (@{$attributes->{attribute}})
+{
+    if (exists $attrs->{readable} &&
+        exists $attrs->{writeable} &&
+        exists $attrs->{persistency} &&
+        $attrs->{persistency} eq "non-volatile")
+    {
+        print $rwAttrFile "$attrs->{id}\n";
+    }
+
+}
+close $rwAttrFile;
+
 # Open the output files and write them
 if( !($cfgSrcOutputDir =~ "none") )
 {