[WIP] Fix LLDB.framework install path in build-script.

(cherry picked from commit 3dc011b)

Author: dcci

utils/build-script-impl

@@ -2472,6 +2472,7 @@ for host in "${ALL_HOSTS[@]}"; do
                     -DLLDB_SWIFTC:PATH="$(build_directory ${LOCAL_HOST} swift)/bin/swiftc"
                     -DLLDB_SWIFT_LIBS:PATH="$(build_directory ${LOCAL_HOST} swift)/lib/swift"
                     -DCMAKE_INSTALL_PREFIX:PATH="$(get_host_install_prefix ${host})"
+                    -DLLDB_FRAMEWORK_INSTALL_DIR="$(get_host_install_prefix ${host})../System/Library/PrivateFrameworks"
                     -DLLVM_DIR:PATH=${llvm_build_dir}/lib/cmake/llvm
                     -DClang_DIR:PATH=${llvm_build_dir}/lib/cmake/clang
                     -DSwift_DIR:PATH=${swift_build_dir}/lib/cmake/swift