Fix building the library with cmake for windows

Change-Id: Ib6367fa94c60f7239fe02ace81c06054b1b4a837
Reviewed-on: https://chromium-review.googlesource.com/988532Reviewed-by: Frank Barchard <fbarchard@chromium.org>
Commit-Queue: Frank Barchard <fbarchard@chromium.org>

CMakeLists.txt

@@ -59,7 +59,11 @@ if(TEST)
   endif()
 
   add_executable(libyuv_unittest ${ly_unittest_sources})
-  target_link_libraries(libyuv_unittest ${ly_lib_name} ${GTEST_LIBRARY} pthread)
+  target_link_libraries(libyuv_unittest ${ly_lib_name} ${GTEST_LIBRARY})
+  find_library(PTHREAD_LIBRARY pthread)
+  if(NOT PTHREAD_LIBRARY STREQUAL "PTHREAD_LIBRARY-NOTFOUND")
+    target_link_libraries(libyuv_unittest pthread)
+  endif()
   if (JPEG_FOUND)
     target_link_libraries(libyuv_unittest ${JPEG_LIBRARY})
   endif()
@@ -75,7 +79,7 @@ endif()
 # install the conversion tool, .so, .a, and all the header files
 INSTALL ( PROGRAMS ${CMAKE_BINARY_DIR}/yuvconvert			DESTINATION bin )
 INSTALL ( TARGETS ${ly_lib_static}						DESTINATION lib )
-INSTALL ( TARGETS ${ly_lib_shared} LIBRARY				DESTINATION lib )
+INSTALL ( TARGETS ${ly_lib_shared} LIBRARY				DESTINATION lib RUNTIME DESTINATION bin )
 INSTALL ( DIRECTORY ${PROJECT_SOURCE_DIR}/include/		DESTINATION include )
 
 # create the .deb and .rpm packages using cpack