gitignore: only match binaries in current folder, remove main*

.gitignore

@@ -24,10 +24,10 @@ _testmain.go
 *.test
 *.prof
 
-lnd
+/lnd
-lnd-debug
+/lnd-debug
-lncli
+/lncli
-lncli-debug
+/lncli-debug
 
 # Integration test log files
 output*.log
@@ -54,6 +54,4 @@ profile.tmp
 
 .DS_Store
 
-main*
-
 .vscode