Commit all of GLM into this branch because why not

I do not like it but I have done it

portability ftw

test/glm/util/conan-package/test_package/main.cpp

@@ -0,0 +1,6 @@
+#include "glm/glm.hpp"
+
+int main (){
+  glm::mat4x4 aMatrix;
+  return 0;
+}