fix(nemo-speech-cpp): make sentencepiece setup portable

Normalize the pinned upstream helper's GNU-only install invocation before running it so the Darwin backend can preserve the dependency licenses with BSD install.

Assisted-by: Codex:gpt-5.6 [Codex]

Author: localai-org-maint-bot

backend/go/nemo-speech-cpp/Makefile

@@ -279,6 +279,12 @@ patch-itn-headers:
 itn: $(ITN_MARKER)
 
 $(SENTENCEPIECE_MARKER): | sources/NeMo-Speech.cpp
+	# Upstream uses GNU install's -D for licenses, which BSD install on macOS
+	# does not support. Create the destination first and use the portable form.
+	cd sources/NeMo-Speech.cpp && \
+		install -d .deps/sentencepiece/share/licenses/nemo-speech/third_party/sentencepiece && \
+		sed -i.bak 's/install -Dm0644/install -m 0644/' scripts/build_sentencepiece_static.sh && \
+		rm -f scripts/build_sentencepiece_static.sh.bak
 	cd sources/NeMo-Speech.cpp && JOBS=$(JOBS) scripts/build_sentencepiece_static.sh
 
 sentencepiece: $(SENTENCEPIECE_MARKER)