Currently, by default LLDB runs an API test with 3 variants,
one of which, depending on platform, is `gmodules`. However,
most tests don't actually make use of any specific `gmodules`
feature since they compile a single `main.cpp` file without
imporint types from other modules.
Instead of running all tests an extra time with `-gmodules`
enabled, we plan to test `gmodules` features with dedicated
API tests that explicitly opt-into compiling with `-gmodules`.
One of the main benefits of this will be a reduction in total
API test-suite run-time (by around 1/3).
This patch adds a flag to `debug_info_categories` that indicates
whether a category is eligible to be replicated by `lldbtest`.
Keeping `gmodules` a debug-info category is desirable because
`builder.py` knows how to inject the appropriate Makefile flags
into the build command for debug-info categories already. Whereas
for non-debug-info categories we'd have to teach it how to. The
category is inferred from the test-name debug-info suffix currently.
Differential Revision: https://reviews.llvm.org/D134524
12502ee551