Log Message:
libretro-mgba: Update to 0.7.2

Emulation fixes:

    GB: Fix HALT when IE and IF unused bits are set (fixes #1349)
    GB Timer: Fix timing adjustments when writing to TAC (fixes #1340)
    GB Video: Fix window y changing mid-window (fixes #1345)
    GB Video: Fix more window edge cases (fixes #1346)
    GBA: Fix RTC on non-standard sized ROMs (fixes #1400)
    GBA DMA: Fix DMA0-2 lengths (fixes #1344)
    GBA Memory: Fix writing to OBJ memory in modes 3 and 5
    GBA Memory: Prevent writing to mirrored BG VRAM (fixes #743)
    GBA Video: Fix scanline cache with scale factor change edge cases
    GBA Video: Fix sprite mosaic clamping (fixes #1008)
    GBA Video: Implement mosaic on transformed sprites (fixes #5)

Other fixes:

    All: Fix several memory leaks
    GB Core: Fix toggling WIN and OBJ being swapped
    GBA: Fix skipping BIOS on irregularly sized ROMs