graphics/blender: fix build on big-endian

/wrkdirs/usr/ports/graphics/blender/work/blender-4.2.0/source/blender/blenlib/intern/filereader_zstd.c:42:3: error: call to undeclared function 'BLI_endian_switch_uint32'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration]

BLI_endian_switch_uint32(val);
^