tests.yml: Add a test to check size of libLLVM.so

There is a bug in the build system that can cause binary stripping
to fail without failing the build, so add a check to ensure that
libLLVM.so is stripped.

https://bugzilla.redhat.com/show_bug.cgi?id=1793250

tests/tests.yml

@@ -14,6 +14,15 @@
       - rust-sanity:
           dir: ./
           run: cargo new hello && cd hello && cargo run
+      # There is a bug in the build process when it runs out of disk space
+      # while stripping binaries, which causes the strip to fail, but does
+      # not fail the build.  This results in a libLLVM.so that is over 2GB
+      # which breaks the nightly compose.  So this test checks that libLLVM.so
+      # is less than 100MB to ensure it was successfully stripped.
+      # https://bugzilla.redhat.com/show_bug.cgi?id=1793250
+      - libllvm-size:
+        dir: ./
+        run: test `stat -L -c %s /usr/lib64/libLLVM.so` -lt 100000000
       # This test ensures that the spec file still builds correctly with
       # %global compat_build 1
       # FIXME: This fails, because the CI system has a hard-coded timeout of 4