.gitignore: add dependencies and output

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: Iaae0c5a33dd1180daa953e423de4c2ce628d6e2f
diff --git a/.gitignore b/.gitignore
index a007fea..f42be22 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,20 @@
 build/*
+boost-src
+Boost-prefix
+CMakeFiles
+boost-src
+nlohmann-json-prefix
+nlohmann-json-src
+nlohmann
+prefix
+sdbusplus-project
+sdbusplus-src
+valijson-prefix
+valijson-src
+valijson
+CMakeCache.txt
+Makefile
+cmake_install.cmake
+compile_commands.json
+entity-manager
+fru-device