[llvm] [CI] Disable PIE on Linux Premerge Builds (PR #154584)

[Aiden Grossman via llvm-commits]

boomanaiden154 wrote:

> We might even consider doing this in CMake. I'd probably use it on our CI if we had it.

What do you mean do this in CMake? As in add an additional flag? In https://reviews.llvm.org/D140880 the consensus seemed to be that having a flag doesn't make a lot of sense because it's more complexity in the CMake for about the same number of characters as explicitly setting `CMAKE_EXE_LINKER_FLAGS`.

https://github.com/llvm/llvm-project/pull/154584