- Fix a SIGBUS on darwin/arm64 and SIGSEGV on linux/arm64 when the jump trampoline overwrote R10, which is the 11th integer argument slot in Go's ARM64 ABI
buildJmpDirectivenow usesx17(platform scratch / REGRT2) instead ofx10, so arguments that land in R10 (for example a flattened struct plus ananydata word) are no longer replaced with the mock code address
Reference: #189