tests: unstrip: Add test for mismatched .strtab sections

Current unstrip test cases either have no .symtab/.strtab in the
stripped binary, or .strtab sections that are identical between the
stripped and debuginfo binaries.  Add a test case where .symtab/.strtab
in the stripped binary contains a small subset of the full unstripped
data.

Signed-off-by: Kevin Cernekee <cernekee@chromium.org>
6 files changed