.gitignore: add compile

Change-Id: I27a8663cc48ca7a76fb1cdf4ad103a854febc812
diff --git a/.gitignore b/.gitignore
index 73505b6..4a42306 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,6 +8,7 @@
 aclocal.m4
 config.*
 configure
+compile
 depcomp
 libtool
 ltmain.sh