Align Eclipse compiler settings with core Gerrit's

Having the same compiler settings as core Gerrit means that when
the project is opened in its standalone Eclipse project, the same
warnings appear as when opened within the Gerrit tree (i.e. as a
bundled plugin).

Change-Id: I72ee1b550db591655370952a1465ad1fdf4acb9b
diff --git a/.gitignore b/.gitignore
index fe0be47..b6af1fb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,7 +1,6 @@
 /.classpath
 /.project
-/.settings/org.maven.ide.eclipse.prefs
-/.settings/org.eclipse.m2e.core.prefs
+/.settings
 /bazel-bin
 /bazel-genfiles
 /bazel-oauth
diff --git a/.settings/org.eclipse.core.runtime.prefs b/.settings/org.eclipse.core.runtime.prefs
new file mode 100644
index 0000000..8667cfd
--- /dev/null
+++ b/.settings/org.eclipse.core.runtime.prefs
@@ -0,0 +1,3 @@
+#Tue Sep 02 16:59:24 PDT 2008
+eclipse.preferences.version=1
+line.separator=\n