Update Maintainer field of debian/control

My understanding is that having my name there is just as wrong
as having name of Linus, since neither of us is a debian
maintainer, but at least this would prevent people from bugging
Linus.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

debian/control

 Source: git-core
 Section: devel
 Priority: optional
-Maintainer: Linus Torvalds <torvalds@osdl.org>
+Maintainer: Junio C Hamano <junkio@cox.net>
 Build-Depends-Indep: libz-dev, libssl-dev, libcurl3-dev, asciidoc > 6.0.3, xmlto, debhelper (>= 4.0.0)
 Standards-Version: 3.6.1