Updated license script to ignore testdata directories, which often contain object files and other compilation results (#13261)

Author: bkonyi

ci/licenses_golden/licenses_third_party

@@ -1,4 +1,4 @@
-Signature: a418a65187112c66586ad4b47f6c2f6e
+Signature: 2cc07f9d4ea778820af052007d9c6b64
 
 UNUSED LICENSES:
 
@@ -3308,27 +3308,6 @@ FILE: ../../../third_party/boringssl/src/util/bot/yasm-win32.exe.sha1
 FILE: ../../../third_party/boringssl/src/util/doc.config
 FILE: ../../../third_party/boringssl/src/util/doc.go
 FILE: ../../../third_party/boringssl/src/util/fipstools/delocate.peg.go
-FILE: ../../../third_party/boringssl/src/util/fipstools/testdata/ppc64le-GlobalEntry/in.s
-FILE: ../../../third_party/boringssl/src/util/fipstools/testdata/ppc64le-GlobalEntry/out.s
-FILE: ../../../third_party/boringssl/src/util/fipstools/testdata/ppc64le-LoadToR0/in.s
-FILE: ../../../third_party/boringssl/src/util/fipstools/testdata/ppc64le-LoadToR0/out.s
-FILE: ../../../third_party/boringssl/src/util/fipstools/testdata/ppc64le-Sample/in.s
-FILE: ../../../third_party/boringssl/src/util/fipstools/testdata/ppc64le-Sample/out.s
-FILE: ../../../third_party/boringssl/src/util/fipstools/testdata/ppc64le-Sample2/in.s
-FILE: ../../../third_party/boringssl/src/util/fipstools/testdata/ppc64le-Sample2/out.s
-FILE: ../../../third_party/boringssl/src/util/fipstools/testdata/ppc64le-TOCWithOffset/in.s
-FILE: ../../../third_party/boringssl/src/util/fipstools/testdata/ppc64le-TOCWithOffset/out.s
-FILE: ../../../third_party/boringssl/src/util/fipstools/testdata/x86_64-BSS/in.s
-FILE: ../../../third_party/boringssl/src/util/fipstools/testdata/x86_64-BSS/out.s
-FILE: ../../../third_party/boringssl/src/util/fipstools/testdata/x86_64-Basic/in.s
-FILE: ../../../third_party/boringssl/src/util/fipstools/testdata/x86_64-Basic/out.s
-FILE: ../../../third_party/boringssl/src/util/fipstools/testdata/x86_64-GOTRewrite/in.s
-FILE: ../../../third_party/boringssl/src/util/fipstools/testdata/x86_64-GOTRewrite/out.s
-FILE: ../../../third_party/boringssl/src/util/fipstools/testdata/x86_64-LabelRewrite/in1.s
-FILE: ../../../third_party/boringssl/src/util/fipstools/testdata/x86_64-LabelRewrite/in2.s
-FILE: ../../../third_party/boringssl/src/util/fipstools/testdata/x86_64-LabelRewrite/out.s
-FILE: ../../../third_party/boringssl/src/util/fipstools/testdata/x86_64-Sections/in.s
-FILE: ../../../third_party/boringssl/src/util/fipstools/testdata/x86_64-Sections/out.s
 FILE: ../../../third_party/dart/sdk/lib/_internal/vm/lib/bigint_patch.dart
 FILE: ../../../third_party/dart/sdk_nnbd/lib/_internal/vm/lib/bigint_patch.dart
 ----------------------------------------------------------------------------------------------------

ci/licenses_golden/tool_signature

@@ -1,2 +1,2 @@
-Signature: 7b11795b00951b599ebcb863350a0bfa
+Signature: 08be4aac8462f27c271b92ad1770e25e
 

tools/licenses/lib/main.dart

@@ -925,6 +925,7 @@ class _RepositoryDirectory extends _RepositoryEntry implements LicenseSource {
             entry.name != 'test' &&
             entry.name != 'test.disabled' &&
             entry.name != 'test_support' &&
+            entry.name != 'testdata' &&
             entry.name != 'tests' &&
             entry.name != 'javatests' &&
             entry.name != 'testing' &&