android: compiler/nir: build nir_divergence_analysis.c

Prerequisite to avoid following radv linking error happening with aco

FAILED: out/target/product/x86_64/obj_x86/SHARED_LIBRARIES/vulkan.radv_intermediates/LINKED/vulkan.radv.so
...
external/mesa/src/amd/compiler/aco_instruction_selection_setup.cpp:178:
error: undefined reference to 'nir_divergence_analysis'
clang.real: error: linker command failed with exit code 1 (use -v to see invocation)

Fixes: df86c5ff ("nir: add divergence analysis pass.")
Signed-off-by: Mauro Rossi <issor.oruam@gmail.com>
(cherry picked from commit 268fb10e)