dot gitignore: add qemu-monitor.texi

add qemu-monitor.texi to .gitignore.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/.gitignore b/.gitignore
index a8da10e..4165e51 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,6 +22,7 @@
 qemu-img-cmds.texi
 qemu-img-cmds.h
 qemu-io
+qemu-monitor.texi
 .gdbinit
 *.a
 *.aux