Update Makefile

Signed-off-by: DL6ER <dl6er@dl6er.de>

.gitignore

@@ -1,10 +1,10 @@
-# Generated binary files
-/obj/
-/dnsmasq/obj
-pihole-FTL
-socket-test
+# Object files output by the assembler
+/build
 
-# Versioning files
+# Generated binary
+pihole-FTL
+
+# Versioning files (generated by Makefile)
 version*
 
 # CMake files
@@ -13,12 +13,7 @@ version*
 
 # IDE files
 .idea/
-
-# Test-generated files
-/pihole.log
-/pihole-FTL.conf
-/*.db
-/pihole-FTL.log
+.vscode/
 
 # MAC->Vendor database files
 tools/manuf.data