[master] Update .gitignore entries

src/bin/loadzone/.gitignore

@@ -1,4 +1,5 @@
 /b10-loadzone
+/b10-loadzone.py
 /loadzone.py
 /run_loadzone.sh
 /b10-loadzone.8

src/lib/python/isc/datasrc/tests/.gitignore

@@ -1 +1,2 @@
 /*.sqlite3.copied
+/zoneloadertest.sqlite3

tests/tools/perfdhcp/tests/.gitignore

@@ -1 +1,6 @@
 /run_unittests
+/test1.hex
+/test2.hex
+/test3.hex
+/test4.hex
+/test5.hex