Rename merge_archives.sh for consistency

Dockerfile

@@ -34,7 +34,7 @@ COPY build-compiler-rt.sh .
 RUN ./build-compiler-rt.sh $TOOLCHAIN_PREFIX 6.0.0
 
 # Build libunwind/libcxxabi/libcxx
-COPY build-libcxx.sh merge_archives.sh ./
+COPY build-libcxx.sh merge-archives.sh ./
 RUN ./build-libcxx.sh $TOOLCHAIN_PREFIX
 
 WORKDIR /build

build-libcxx.sh

@@ -32,7 +32,7 @@ if [ ! -d libcxx ]; then
 fi
 
 LIBCXX=$(pwd)/libcxx
-MERGE_ARCHIVES=$(pwd)/merge_archives.sh
+MERGE_ARCHIVES=$(pwd)/merge-archives.sh
 
 cd libunwind
 for arch in $ARCHS; do