Update .gitignore

Author: schweikert

.gitignore

@@ -1,16 +1,15 @@
-.*.swp
 *.tar.gz
 *~
-src/*.gcno
-src/*.gcda
-src/*.gcov
-src/tags
+.*.swp
+.cache
 .deps
 Makefile
 Makefile.in
 aclocal.m4
 autom4te.cache
+ci/build
 compile
+compile_commands.json
 config.guess
 config.h
 config.h.in
@@ -19,12 +18,15 @@ config.status
 config.sub
 configure
 depcomp
+doc/fping.8
+doc/fping6.8
 install-sh
 missing
+src/*.gcda
+src/*.gcno
+src/*.gcov
 src/*.o
 src/fping
 src/fping6
+src/tags
 stamp-h1
-doc/fping.8
-doc/fping6.8
-ci/build