Merge pull request #977 from jdumas/glfw

Bump version of glfw.

cmake/LibiglDownloadExternal.cmake

@@ -77,7 +77,7 @@ endfunction()
 function(igl_download_glfw)
 	igl_download_project(glfw
 		GIT_REPOSITORY https://github.com/glfw/glfw.git
-		GIT_TAG        58cc4b2c5c2c9a245e09451437dd6f5af4d60c84
+		GIT_TAG        53c8c72c676ca97c10aedfe3d0eb4271c5b23dba
 	)
 endfunction()