lit: Fix a sh lexing bug which caused annotate-token.m to fail when run with the internal shell parser; we weren't lexing the quotes in a command like::
lit: Fix a sh lexing bug which caused annotate-token.m to fail when run with the
internal shell parser; we weren't lexing the quotes in a command like::

  clang -DFOO='hello'

correctly.

git-svn-id: a4a6f32337ebd29ad4763b423022f00f68d1c7b7@103652 91177308-0d34-0410-b5e6-96231b3b80d8

lodyagin/bare_cxx,lodyagin/bare_cxx,lodyagin/bare_cxx,lodyagin/bare_cxx,lodyagin/bare_cxx