8177290: add copy factory methods for unmodifiable List, Set, Map 8184690: add Collectors for collecting into unmodifiable List, Set, and Map Reviewed-by: alanb, briangoetz, dholmes, jrose, rriggs, scolebourne

8192995: run-test gtest should use all jvm variants, not just "server" Reviewed-by: erikj

8146977: Move the output "Building configuration X (matching Y)" to lower log level Reviewed-by: erikj

8175795: configure should verify that system zlib contains needed functionality Reviewed-by: erikj

8192854: FONTCONFIG_CFLAGS missing from spec.gmk.in Reviewed-by: erikj, prr

8189749: Devise strategy for making source level checks more uniform Summary: Create a 'feature' enum which is responsible for handling source version checks and related diagnostic generation Reviewed-by: jjg, jlahoda

8192961: Remove some double semicolons Reviewed-by: redestad