android: define HAVE_DL_ITERATE_PHDR for build-id code

android: define HAVE_DL_ITERATE_PHDR for build-id code

Required due to d4fa083 "util: Add utility build-id code."
to avoid following build error and warnings:

external/mesa/src/intel/vulkan/anv_device.c:60:32: error: incompatible integer to pointer conversion initializing 'const struct build_id_note *' with an expression of type 'int' [-Werror,-Wint-conversion]
   const struct build_id_note *note = build_id_find_nhdr("libvulkan_intel.so");
                               ^      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
external/mesa/src/intel/vulkan/anv_device.c:64:19: warning: implicit declaration of function 'build_id_length' is invalid in C99 [-Wimplicit-function-declaration]
   unsigned len = build_id_length(note);
                  ^
external/mesa/src/intel/vulkan/anv_device.c:68:4: warning: implicit declaration of function 'build_id_read' is invalid in C99 [-Wimplicit-function-declaration]
   build_id_read(note, uuid, VK_UUID_SIZE);
   ^
3 warnings and 1 error generated.
[ 40% 1438/3588] target  C: libmesa_vulkan_common_32 <= external/mesa/src/intel/vulkan/anv_image.c
ninja: build stopped: subcommand failed.
build/core/ninja.mk:148: recipe for target 'ninja_wrapper' failed
make: *** [ninja_wrapper] Error 1

Fixes: d4fa083e11f ("util: Add utility build-id code.")
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Acked-by: Emil Velikov <emil.velikov@collabora.com>