Make pki_sources available to Soong

This allows building libpki in aosp with some changes
to the downstream bp file

Bug: b/322154153
Change-Id: I68773079ec44929b71c1990d13bd3198a4c57ea7
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/66587
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>

util/generate_build_files.py

diff --git a/util/generate_build_files.py b/util/generate_build_files.py
index 6038ba2..7024090 100644
--- a/util/generate_build_files.py
+++ b/util/generate_build_files.py
@@ -127,6 +127,7 @@
       self.PrintDefaults(blueprint, 'boringssl_test_support_sources', files['test_support'])
       self.PrintDefaults(blueprint, 'boringssl_crypto_test_sources', files['crypto_test'])
       self.PrintDefaults(blueprint, 'boringssl_ssl_test_sources', files['ssl_test'])
+      self.PrintDefaults(blueprint, 'libpki_sources', files['pki'])
 
     # Legacy Android.mk format, only used by Trusty in new branches
     with open('sources.mk', 'w+') as makefile: