Let CMake build position independent code by default
Let CMake build position independent code by default

Configure CMake to compile static libraries with position independent code, as discussed in #451.

Closes #451.

Closes https://github.com/google/iree/pull/454

COPYBARA_INTEGRATE_REVIEW=https://github.com/google/iree/pull/454 from marbre:cmake-fPIC d11b9a4b447deb3bce46d706e3acab2cbc785761
PiperOrigin-RevId: 289168946

iree-org/iree,google/iree,google/iree,google/iree,iree-org/iree,iree-org/iree,google/iree,google/iree,iree-org/iree,iree-org/iree,iree-org/iree,iree-org/iree,google/iree,google/iree