Rename a test file so that it matches with the option name it is testing.

llvm-svn: 300679

diff --git a/lld/test/ELF/compress-debug-output.s b/lld/test/ELF/compress-debug-sections.s
similarity index 100%
rename from lld/test/ELF/compress-debug-output.s
rename to lld/test/ELF/compress-debug-sections.s