[llvm] [JITLink][AArch64] Implement R_AARCH64_LDR_PREL_LO19 (PR #82172)

[Pavel Samolysov via llvm-commits]

samolisov wrote:

@eymay I see you recently changed the `ELF_aarch64.cpp` file, could you have a look at the patch?

https://github.com/llvm/llvm-project/pull/82172