clc: force fPIC for every user when using shared LLVM

As we want to start using `dladdr`, this is needed to prevent `dladdr`
returning information of the wrong file.

Fixes tag as it's required by the actual fix.

Signed-off-by: Karol Herbst <kherbst@redhat.com>
Fixes: e22491c832 ("clc: fetch clang resource dir at runtime")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25568>

src/compiler/clc/meson.build

@@ -105,7 +105,13 @@ _libmesaclc = static_library(
                  idep_mesautil, dep_spirv_tools, idep_vtn]
 )
 
+_idep_mesaclc_link_args = []
+if _shared_llvm
+  _idep_mesaclc_link_args += cc.get_supported_link_arguments('-fPIC')
+endif
+
 idep_mesaclc = declare_dependency(
   link_with : _libmesaclc,
   include_directories : include_directories('.'),
+  link_args : _idep_mesaclc_link_args,
 )