Rewrite TestTargetSymbolsBuildidCase to be more focused

Summary:
The test was failing in remote debugging scenario with windows as a host
as cmd.exe is not able to parse the complicated shell commands in the
Makefile.

The test seemed like a perfect candidate for a more focused testing
approach, so I have rewritten in on top of lldb-test's module-sections
functionality. The slight gotcha there was that the
Module::GetSectionList does not include the sections from the symbol
file until someone manually calls Module::GetSymbolVendor. Normally,
this is not an issue, because someone will have initialized the symbol
vendor by the time anyone starts looking at the sections. However, when
all one this is dump the section list, we run into this problem.

I've tried making this behavior more automatic, but it turns out it's
not that easy, so for now, I just manually initialize the Symbol Vendor
before dumping out the sections in lldb-test.

Reviewers: jankratochvil

Subscribers: lldb-commits

Differential Revision: https://reviews.llvm.org/D42914

llvm-svn: 326805

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