Exclude out/** from the source glob.

This directory is used by IntelliJ if scripts/setup-intellij.sh is used to generate the .iml file.

--
MOS_MIGRATED_REVID=117801566

BUILD

diff --git a/BUILD b/BUILD
index 6a7333e..3852863 100644
--- a/BUILD
+++ b/BUILD
@@ -21,9 +21,10 @@
     srcs = glob(
         ["**"],
         exclude = [
-            "bazel-*/**",
-            "output/**",
-            ".*/**",
+            "bazel-*/**",  # convenience symlinks
+            "out/**"       # IntelliJ with setup-intellij.sh
+            "output/**",   # output of compile.sh
+            ".*/**",       # mainly git
         ],
     ) + [
         "//examples:srcs",