Update .gitinore files

I noticed a bunch of new things had crept in.

Change-Id: Ie6ef085357a3bf026f2b42689ee642192a7791e7
Reviewed-on: http://gerrit.cloudera.org:8080/7590
Reviewed-by: Tim Armstrong <tarmstrong@cloudera.com>
Tested-by: Tim Armstrong <tarmstrong@cloudera.com>

.gitignore

@@ -16,6 +16,7 @@ bin/impala-config-local.sh
 
 # distcc options
 .impala_compiler_opts
+.impala_compiler_opts_v2
 
 pprof.out
 
@@ -56,5 +57,7 @@ hs_err_pid*.log
 *.jar
 
 # Vim related files
+.*.swn
+.*.swo
 .*.swp
 .vimrc

be/.gitignore

@@ -1,6 +1,13 @@
 *~
 
 build
+
+# Generated sources.
 generated-sources/**/*
 src/common/version.cc
+src/kudu/util/protoc-gen-insertions
+*.pb.h
+*.pb.cc
 
+# Static libraries.
+*.a

testdata/.gitignore

@@ -28,3 +28,6 @@ block-ids
 
 # Generated data loading files
 load-*-hbase.create
+
+# Temporary data generated by tests.
+tmp-scanner-fuzz*