CLRefPointer: fix reference to STL type for MinGW Clang See: https://invent.kde.org/graphics/krita/-/blob/master/3rdparty/ext_googleangle/02-patches_krita/0012-Fix-Clang-MinGW-target-build.patch Co-authored-by: Alvin Wong <alvinhochun@gmail.com> Bug: None Change-Id: I0b7acebf7246297cbf8aa5062256c7008f78cf7b Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4637586 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Auto-Submit: L. E. Segovia <amy@amyspark.me>