Refine logic choosing vendor snapshot modules

This refines the vendor snapshot codes in order to fix logic errors.

- Capture toolchain_library and cc_library_headers correctly.
- Redirect unwind static library correctly.
- Filter out sanitize / coverage / lto by looking at HideFromMake.
- Add binary() function for clear and shorter codes.
- Include test modules.
- Add more tests to prevent further snapshot breakages.

Bug: 157106227
Test: m vendor-snapshot
Test: m nothing for all available targets
Test: EMMA_INSTRUMENT=true EMMA_INSTRUMENT_FRAMEWORK=true \
NATIVE_COVERAGE=true COVERAGE_PATHS="*" m nothing

Change-Id: Id90082b5ab730f928582ad24f022ba410855400e
diff --git a/cc/testing.go b/cc/testing.go
index 6119920..d92309f 100644
--- a/cc/testing.go
+++ b/cc/testing.go
@@ -457,6 +457,7 @@
 		"my_include":  nil,
 		"foo.map.txt": nil,
 		"liba.so":     nil,
+		"libb.a":      nil,
 	}
 
 	GatherRequiredFilesForTest(mockFS)