subprojects: Ignore wrap files from subprojects

Make git status a little happier.

Change-Id: Ia489f66966ecd78271c1bc77b90b87888e211b40
Signed-off-by: Peter Foley <pefoley@google.com>
diff --git a/.gitignore b/.gitignore
index 60a287f..4910f77 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,8 @@
 Testing/
 subprojects/*
 !subprojects/*.wrap
+# Explicitly ignore wrap-redirect files.
+subprojects/CLI11.wrap
+subprojects/function2.wrap
+subprojects/googletest.wrap
+subprojects/phosphor-objmgr.wrap