Update .gitignore files for ninja, coredumps and pypi packages

Change-Id: Ie7d34fbd27150ba6c437207611f71bb95a0e4cba
Reviewed-on: http://gerrit.cloudera.org:8080/3814
Reviewed-by: Dan Hecht <dhecht@cloudera.com>
Tested-by: Internal Jenkins

.gitignore

@@ -28,6 +28,10 @@ CMakeFiles
 cmake_install.cmake
 CTestTestfile.cmake
 !CMakeLists.txt
+.ninja_deps
+.ninja_log
+build.ninja
+rules.ninja
 
 Testing/
 llvm-ir/
@@ -43,3 +47,8 @@ logs/
 
 # Impala toolchain directory
 toolchain/
+
+# Core dumps and crash reports
+core
+core.*
+hs_err_pid*.log

infra/python/deps/.gitignore

@@ -0,0 +1,5 @@
+# Ignore downloaded python packages
+*.tar.bz2
+*.tar.gz
+*.whl
+*.zip