Tweak the syntax of umbrella headers, so that "umbrella" is treated as
a modifier for a header declarartion, e.g.,

umbrella header "headername"

Collapse the umbrella-handling code in the parser i

Tweak the syntax of umbrella headers, so that "umbrella" is treated as
a modifier for a header declarartion, e.g.,

umbrella header "headername"

Collapse the umbrella-handling code in the parser into the
header-handling code, so we don't duplicate the header-search logic.

llvm-svn: 146159

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When searching for a module, speculatively load module maps to see if
the module is described in one of the module maps in a search path or
in a subdirectory off the search path that has the same nam

When searching for a module, speculatively load module maps to see if
the module is described in one of the module maps in a search path or
in a subdirectory off the search path that has the same name as the
module we're looking for.

llvm-svn: 144433

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