fixup! make sure we build lldb test dependencies

Author: Michael137

libcxx/utils/ci/run-buildbot

@@ -371,6 +371,7 @@ bootstrapping-build)
           -DLLVM_LIT_ARGS="-sv --xunit-xml-output test-results.xml --timeout=1500 --time-tests"
 
     echo "+++ Running the LLDB libc++ data formatter tests"
+    ${NINJA} -vC "${BUILD_DIR}" lldb-api-test-deps
     ${BUILD_DIR}/bin/llvm-lit -sv "--category libc++" "${MONOREPO_ROOT}/lldb/test/API"
 
     echo "--- Running the libc++ and libc++abi tests"