gitignore: add some more trash

Signed-off-by: Maciej Barć <xgqt@protonmail.com>

.gitignore

@@ -1,12 +1,15 @@
+*.log
 *.swp
 *~
 ,*
 .idea/
+.vs/
 .vscode/
 .~lock.*
 /.ebuild.x
 /distfiles/
 /eclass/*.5
 /local/
+/metadata/md5-cache
 /packages/
 /profiles/use.local.desc