libretro-bluemsx: Update to 20200507

David Demelier (1):
      Fix build under clang

Vladimir Serbinenko (5):
      Fix 3DS compilation
      Fix libnx compilation
      Add support for psl1ght
      Fix arguments for coinDeviceCreate
      Remove leftover endiannness defines

diedel (1):
      Fixed not smooth scroll in PAL 50Hz

(nia)