FFI: Add missing coercion when recording 64-bit bit.*(). #557

Job	Run time
coverage / coverage	13m 41s
debug / debug	11m 47s
debug aarch64 / debug_aarch64	55m 9s
debug ASAN clang / debug_asan_clang	33m 8s
gcc centos 7 / default_gcc_centos_7	9m 42s
out of source / out_of_source	11m 19s
release / release	9m 10s
release ASAN clang / release_asan_clang	17m 35s
release clang / release_clang	7m 24s
release lto / release_lto	18m 18s
release lto clang / release_lto_clang	16m 2s
static build / static_build	7m 42s
	3h 30m 57s

Provide feedback