Update on "[llava][6/N] Add export_llava.py"

Summary: As titled. Pending CI job

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Differential Revision: [D59901269](https://our.internmc.facebook.com/intern/diff/D59901269)

[ghstack-poisoned]

Author: larryliu0820

.github/workflows/pull.yml

@@ -206,6 +206,7 @@ jobs:
         PYTHON_EXECUTABLE=python bash .ci/scripts/setup-linux.sh "cmake"
 
         # install Llava requirements
+        bash examples/models/llama2/install_requirements.sh
         bash examples/models/llava/install_requirements.sh
 
         # run export_llava.sh