Fixed missing escape characters in git-windows/vc.bat. Fixes rohieb#2.

These extra escape characters are needed in the git pretty format so
they are not replaced by variables in the batch script.

Signed-off-by: Nathaniel Struselis <Nathaniel.Struselis@hotmail.co.uk>

git-windows/vc.bat

@@ -18,7 +18,7 @@ if "%1" NEQ "" (
 )
 REM English locale.
 set LC_ALL=C
-git --no-pager log -1 HEAD --pretty=format:"Hash: %H%nAbr. Hash: %h%nParent Hashes: %P%nAbr. Parent Hashes: %p%nAuthor Name: %an%nAuthor Email: %ae%nAuthor Date: %ai%nCommitter Name: %cn%nCommitter Email: %ce%nCommitter Date: %ci%n" |gawk -v script=log -v full=%full% -f vc-git.awk > vc.tex
+git --no-pager log -1 HEAD --pretty=format:"Hash: %%H%%nAbr. Hash: %%h%%nParent Hashes: %%P%%nAbr. Parent Hashes: %%p%%nAuthor Name: %%an%%nAuthor Email: %%ae%%nAuthor Date: %%ai%%nCommitter Name: %%cn%%nCommitter Email: %%ce%%nCommitter Date: %%ci%%n" |gawk -v script=log -v full=%full% -f vc-git.awk > vc.tex
 if "%mod%"=="1" (
   git status --porcelain=v1 |gawk -v script=status -f vc-git.awk >> vc.tex
 )