Add a few .gitignore entries to reduce noise

docs/.gitignore

@@ -8,3 +8,4 @@
 /mono-file-formats.zip
 /mono-tools.tree
 /mono-tools.zip
+/AgilityPack.dll*

mcs/.gitignore

@@ -1,6 +1,14 @@
 *.mdb
 *.exe
+*.dll
+*_test_*.dll.config
+*_test_*.xml
 *.o
+TestResult-*.log
+TestResult-*.xml
+errors/?mcs.log
+errors/dummy.xml
+tests/?mcs.log
 tests/gtest-*.dll
 tests/test-*.dll
 tests/xml-*.xml
@@ -8,11 +16,7 @@ tests/test-*.netmodule
 tests/gxml-*.xml
 tests/test-*.xml
 tests/data.xml
-tests/gmcs.log
-System_test_net_2_0.dll
-System_test_net_2_0.dll.config
-TestResult-net_2_0.log
-TestResult-net_2_0.xml
+class/Mono.Data.Sqlite/test.db
 class/Mono.CSharp/Mono.CSharp.dll.sources
 class/RabbitMQ.Client/docs/specs/autogenerated-api-0-8.cs
 class/RabbitMQ.Client/docs/specs/autogenerated-api-0-9.cs