git: Update .gitignore

- host/ disappeared
- let's ignore .cmd files
- let's ignore include/config directory

Change-Id: If8f4e46b2e56a3d0d1a808ca8ef8c0672e5941d1
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>

.gitignore

@@ -1,17 +1,17 @@
 *.o
 *.a
 *.d
+*.cmd
 .dir
 outdir
 samples/libc/minimal-*-O?
-linux2/
-host/x86-linux2/bin/dec2hex
-host/x86-linux2/bin/mkevents
-host/x86-linux2/bin/sysgen
-host/x86-linux2/bin/genIdt
-host/x86-linux2/bin/genOffsetHeader
-host/x86-linux2/bin/gen_config_abssym
-host/x86-linux2/bin/wrsconfig
+scripts/basic/fixdep
+scripts/gen_idt/gen_idt
+scripts/kconfig/conf
+scripts/kconfig/mconf
+scripts/kconfig/zconf.hash.c
+scripts/kconfig/zconf.lex.c
+scripts/kconfig/zconf.tab.c
 doc/_build
 xml
 html/