Update mingw to build 11888861 am: c3bfbc0e5f am: 54c8410ade

Original change: https://android-review.googlesource.com/c/platform/prebuilts/gcc/linux-x86/host/x86_64-w64-mingw32-4.8/+/3106639

Change-Id: I942dfcb0f7bfd3976c64b3508f481a47be7919e9
Signed-off-by: Automerger Merge Worker <[email protected]>