Update .gitignore for some Eclipse things

Change-Id: I64f8051e580cae148d3d67f4b08160fc126b65ee
Signed-off-by: elinuxhenrik <henrik.b.andersson@est.tech>
diff --git a/.gitignore b/.gitignore
index 67d6d0f..90c40a4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,7 @@
 .tox
 docs/_build/
 .DS_STORE
+
+# Eclipse
+.checkstyle
+.sts4-cache
\ No newline at end of file