[libunwind] Install the DLL when doing "ninja install"

This matches how install(... RUNTIME) is used in e.g. libcxx.

Differential Revision: https://reviews.llvm.org/D98020

GitOrigin-RevId: 39ad160468e2b6acaa0b2b1ab353079eca4a3b03
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index f59dfdd..f341b21 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -183,7 +183,8 @@
 if (LIBUNWIND_INSTALL_LIBRARY)
   install(TARGETS ${LIBUNWIND_INSTALL_TARGETS}
     LIBRARY DESTINATION ${LIBUNWIND_INSTALL_PREFIX}${LIBUNWIND_INSTALL_LIBRARY_DIR} COMPONENT unwind
-    ARCHIVE DESTINATION ${LIBUNWIND_INSTALL_PREFIX}${LIBUNWIND_INSTALL_LIBRARY_DIR} COMPONENT unwind)
+    ARCHIVE DESTINATION ${LIBUNWIND_INSTALL_PREFIX}${LIBUNWIND_INSTALL_LIBRARY_DIR} COMPONENT unwind
+    RUNTIME DESTINATION ${LIBUNWIND_INSTALL_PREFIX}bin COMPONENT unwind)
 endif()
 
 if (NOT CMAKE_CONFIGURATION_TYPES AND LIBUNWIND_INSTALL_LIBRARY)