Add more stuff to .gitignore

.gitignore

@@ -1,5 +1,6 @@
 /man/*.gz
 .depend
+.cache/
 
 # Generated by autogen.sh
 /aclocal.m4
@@ -73,3 +74,10 @@ CMakeFiles/
 /CMakeCache.txt
 /install_manifest.txt
 /install_manifest_*.txt
+
+# OOT builds
+/build*
+
+# LSP
+.clangd/
+compile_commands.json