LLVM patch: support .lib extension for static zstd

Author: andrewrk

llvm/cmake/modules/Findzstd.cmake

@@ -12,6 +12,9 @@
 
 if(MSVC OR "${CMAKE_CXX_SIMULATE_ID}" STREQUAL "MSVC")
   set(zstd_STATIC_LIBRARY_SUFFIX "_static\\${CMAKE_STATIC_LIBRARY_SUFFIX}$")
+elseif(WIN32)
+  set(zstd_SHARED_LIBRARY_SUFFIX "\\${CMAKE_SHARED_LIBRARY_SUFFIX}$")
+  set(zstd_STATIC_LIBRARY_SUFFIX ".lib")
 else()
   set(zstd_STATIC_LIBRARY_SUFFIX "\\${CMAKE_STATIC_LIBRARY_SUFFIX}$")
 endif()