Makefile lexer fixes by Tim.
Makefile lexer fixes by Tim.

erickt/pygments,erickt/pygments,erickt/pygments,erickt/pygments,erickt/pygments,erickt/pygments,erickt/pygments,erickt/pygments,erickt/pygments,erickt/pygments,erickt/pygments,erickt/pygments