fix(build): join EXTRA_CMAKE_ARGS with semicolons for SKBUILD_CMAKE_ARGS

${arr[*]// /;} applies the substitution per-element before joining, so
spaces between elements are never replaced. Use $(IFS=';'; echo "${arr[*]}")
to join elements with semicolons directly.

Fixes #1587

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Ramakrishna Prabhu <ramakrishnap@nvidia.com>

Author: ramakrishnap-nv

build.sh

@@ -416,8 +416,7 @@ fi
 if buildAll || hasArg cuopt; then
     cd "${REPODIR}"/python/cuopt
 
-    # $EXTRA_CMAKE_ARGS gets concatenated into a string with [*] and then we find/replace spaces with semi-colons
-    SKBUILD_CMAKE_ARGS="-DCMAKE_PREFIX_PATH=${INSTALL_PREFIX};-DCMAKE_LIBRARY_PATH=${LIBCUOPT_BUILD_DIR};-DCMAKE_CUDA_ARCHITECTURES=${CUOPT_CMAKE_CUDA_ARCHITECTURES};${EXTRA_CMAKE_ARGS[*]// /;}" \
+    SKBUILD_CMAKE_ARGS="-DCMAKE_PREFIX_PATH=${INSTALL_PREFIX};-DCMAKE_LIBRARY_PATH=${LIBCUOPT_BUILD_DIR};-DCMAKE_CUDA_ARCHITECTURES=${CUOPT_CMAKE_CUDA_ARCHITECTURES};$(IFS=';'; echo "${EXTRA_CMAKE_ARGS[*]}")" \
         python "${PYTHON_ARGS_FOR_INSTALL[@]}" .
 fi