Added script to generate C header with git repo url and rev info.

scripts/genGitHdr.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+OUTPUT_DIR=$1;
+
+FILE="fceux_gitrev.h"
+TMP_FILE="/tmp/$FILE";
+
+GIT_URL=`git config --get remote.origin.url`;
+GIT_REV=`git rev-parse HEAD`;
+
+echo "// fceux_gitrev.h -- DO NOT EDIT: This file is auto-generated at build" >| $TMP_FILE;
+echo "#define FCEUX_GIT_URL  \"$GIT_URL\" " >> $TMP_FILE;
+echo "#define FCEUX_GIT_REV  \"$GIT_REV\" " >> $TMP_FILE;
+
+if [ -e $OUTPUT_DIR/$FILE ]; then
+
+	diff $TMP_FILE  $OUTPUT_DIR/$FILE
+
+	if [ $? != 0 ]; then
+		echo 'File Differs';
+		mv -f  $TMP_FILE  $OUTPUT_DIR/$FILE
+	fi
+else
+	mv -f  $TMP_FILE  $OUTPUT_DIR/$FILE
+fi