Don't pull abi_test.cc into non-GTest targets.

The test_support is kind of a mess right now because it's sometimes used in
GTest targets and sometimes not. It really should be split into two libraries,
but do this for now to unbreak the Android build.

Change-Id: I7cd2b0f6ed9eda1a529ec3c69a92390e20da66f8
Reviewed-on: https://boringssl-review.googlesource.com/c/35084
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: David Benjamin <davidben@google.com>

util/generate_build_files.py

@@ -415,7 +415,7 @@ def NoTestRunnerFiles(path, dent, is_dir):
 
 
 def NotGTestSupport(path, dent, is_dir):
-  return 'gtest' not in dent
+  return 'gtest' not in dent and 'abi_test' not in dent
 
 
 def SSLHeaderFiles(path, dent, is_dir):
@@ -627,6 +627,7 @@ def main(platforms):
 
   crypto_test_files += FindCFiles(os.path.join('src', 'crypto'), OnlyTests)
   crypto_test_files += [
+      'src/crypto/test/abi_test.cc',
       'src/crypto/test/file_test_gtest.cc',
       'src/crypto/test/gtest_main.cc',
   ]