6628146: Exclude the .hgignore and .hgtags files from the source bundles

Summary: Just add to list of SCM files.
Reviewed-by: xdono

make/common/shared/Platform.gmk

@@ -101,10 +101,10 @@ REQUIRED_FREETYPE_VERSION=2.3.0
 # so they will not be included when copying directory trees
 # or packaging up .jar files, etc.  This applies to all workspaces.
 #
-SCM_DIRs = .hg .svn CVS RCS SCCS Codemgr_wsdata deleted_files
+SCM_DIRs = .hg .svn CVS RCS SCCS Codemgr_wsdata deleted_files .hgignore .hgtags
 # When changing SCM_DIRs also change SCM_DIRS_rexp and SCM_DIRS_prune:
-SCM_DIRS_rexp = ".hg|.svn|CVS|RCS|SCCS|Codemgr_wsdata|deleted_files"
-SCM_DIRS_prune = \( -name .hg -o -name .svn -o -name CVS -o -name RCS -o -name SCCS -o -name Codemgr_wsdata -o -name deleted_files \) -prune
+SCM_DIRS_rexp = ".hg|.svn|CVS|RCS|SCCS|Codemgr_wsdata|deleted_files|.hgignore|.hgtags"
+SCM_DIRS_prune = \( -name .hg -o -name .svn -o -name CVS -o -name RCS -o -name SCCS -o -name Codemgr_wsdata -o -name deleted_files -o -name .hgignore -o -name .hgtags \) -prune
 
 # Don't define this unless it's not defined
 ifndef VARIANT