[IncludeCleaner] Also check for spellings of physical headers (#99843)

Some physical headers can have "conflicting" spellings, when same
filename exists under two different include search paths. e.g.
<stdlib.h>
can be provided by both standard library and underlying libc headers. In
such scenarios if the usage is from the latter include-search path,
users can't spell it directly.

This patch ensures we also consider spellings of such includes, in
addition to their physical files to prevent conflicting suggestions.

0 files changed, 0 insertions, 0 deletions