Fix bad patch

...and whoever had the bad idea to make the downloaded GLM_TARBALL
bae83fa5dc7f081768daace6e199adc3-glm-0.9.4.6-libreoffice.zip to already be
patched with that broken patch (external/glm/Wshadow-unix.patch or
external/glm/Wshadow-windows.patch or whatever?) instead of applying locally via
gb_UnpackedTarball_add_patches...

Change-Id: I0053346f626cc3af42f7ea82a7a26c8b47876a98

external/glm/UnpackedTarball_glm.mk

@@ -13,4 +13,8 @@ $(eval $(call gb_UnpackedTarball_set_tarball,glm,$(GLM_TARBALL)))
 
 $(eval $(call gb_UnpackedTarball_set_patchlevel,glm,1))
 
+$(eval $(call gb_UnpackedTarball_add_patches,glm, \
+    external/glm/Wshadow-patch-fix.patch \
+))
+
 # vim: set noet sw=4 ts=4:

external/glm/Wshadow-patch-fix.patch

+--- a/glm/core/type_vec4.hpp
++++ b/glm/core/type_vec4.hpp
+@@ -185,7 +185,7 @@
+ 		template <int E0, int E1>
+ 		GLM_FUNC_DECL tvec4(T const & x_, glm::detail::swizzle<2, T, tvec2<T>, E0, E1, -1, -2> const & v, T const & w_)
+ 		{
+-			*this = tvec4<T>(x_, v(), w);
++			*this = tvec4<T>(x_, v(), w_);
+ 		}
+ 
+ 		template <int E0, int E1>