Ignore *.obj files when gathering licenses (#13241)

* Ignore *.obj files when gathering licenses

* update license hash

Author: bkonyi

ci/licenses_golden/tool_signature

@@ -1,2 +1,2 @@
-Signature: a7021ed1fe0bdedbfa3f76fcc6927f10
+Signature: 7b11795b00951b599ebcb863350a0bfa
 

tools/licenses/lib/main.dart

@@ -53,7 +53,7 @@ abstract class _RepositoryLicensedFile extends _RepositoryFile {
 
   // file names that we are confident won't be included in the final build product
   static final RegExp _readmeNamePattern = RegExp(r'\b_*(?:readme|contributing|patents)_*\b', caseSensitive: false);
-  static final RegExp _buildTimePattern = RegExp(r'^(?!.*gen$)(?:CMakeLists\.txt|(?:pkgdata)?Makefile(?:\.inc)?(?:\.am|\.in|)|configure(?:\.ac|\.in)?|config\.(?:sub|guess)|.+\.m4|install-sh|.+\.sh|.+\.bat|.+\.pyc?|.+\.pl|icu-configure|.+\.gypi?|.*\.gni?|.+\.mk|.+\.cmake|.+\.gradle|.+\.yaml|pubspec\.lock|\.packages|vms_make\.com|pom\.xml|\.project|source\.properties)$', caseSensitive: false);
+  static final RegExp _buildTimePattern = RegExp(r'^(?!.*gen$)(?:CMakeLists\.txt|(?:pkgdata)?Makefile(?:\.inc)?(?:\.am|\.in|)|configure(?:\.ac|\.in)?|config\.(?:sub|guess)|.+\.m4|install-sh|.+\.sh|.+\.bat|.+\.pyc?|.+\.pl|icu-configure|.+\.gypi?|.*\.gni?|.+\.mk|.+\.cmake|.+\.gradle|.+\.yaml|pubspec\.lock|\.packages|vms_make\.com|pom\.xml|\.project|source\.properties|.+\.obj)$', caseSensitive: false);
   static final RegExp _docsPattern = RegExp(r'^(?:INSTALL|NEWS|OWNERS|AUTHORS|ChangeLog(?:\.rst|\.[0-9]+)?|.+\.txt|.+\.md|.+\.log|.+\.css|.+\.1|doxygen\.config|Doxyfile|.+\.spec(?:\.in)?)$', caseSensitive: false);
   static final RegExp _devPattern = RegExp(r'^(?:codereview\.settings|.+\.~|.+\.~[0-9]+~|\.clang-format|\.gitattributes|\.landmines|\.DS_Store|\.travis\.yml|\.cirrus\.yml)$', caseSensitive: false);
   static final RegExp _testsPattern = RegExp(r'^(?:tj(?:bench|example)test\.(?:java\.)?in|example\.c)$', caseSensitive: false);