fix(arm): add llvm-mingw headers

Author: x1unix

Dockerfile

@@ -19,7 +19,7 @@ RUN apt update &&\
 COPY --chmod=0755 scripts/docker-entrypoint.sh /usr/bin/docker-entrypoint.sh
 COPY --chmod=0755 scripts/install-llvm-mingw64.sh /tmp/install-llvm-mingw64.sh 
 COPY --from=builder /tmp/llvm-mingw64 /tmp/llvm-mingw64
-RUN /tmp/install-llvm-mingw64.sh /tmp/llvm-mingw64
+RUN /tmp/install-llvm-mingw64.sh /tmp/llvm-mingw64 && rm -rf /tmp/*
 ENV PATH=/go/bin:$PATH \
     CGO_ENABLED=1 \
     GOOS=windows

scripts/docker-entrypoint.sh

@@ -21,6 +21,7 @@ arm64)
     export CC_FOR_TARGET=aarch64-w64-mingw32-gcc
     export CXX=aarch64-w64-mingw32-g++
     export CC=aarch64-w64-mingw32-gcc
+    export CGO_FLAGS="$CGO_FLAGS -I/usr/generic-w64-mingw32/include"
     ;;
 *)
     echo "Unsupported GOARCH variable value '$GOARCH'. Please set GOARCH environment variable to 'amd64', 'arm64' or '386'"