Import globbing from Soong

Add globbing with dependency checking to blueprint.  Calling
ModuleContext.GlobWithDeps or SingletonContext.GlobWithDeps will return
a list of files that match the globs, while also adding efficient
dependencies to rerun the primary builder if a file that matches the
glob is added or removed.

Also use the globbing support for optional_subdirs=, subdirs= and build=
lines in blueprints files.  The globbing slightly changes the behavior
of subname= lines, it no longer falls back to looking for a file called
"Blueprints".  Blueprint files that need to include a subdirectory with
a different name can use build= instead of subdir= to directly include
them.  The Blueprints file is updated to reset subname="Blueprints" in
case we want to include subdirectories inside blueprint and the primary
builder has changed the subname.

Also adds a new test directory that contains a simple primary builder
tree to test regeneration for globbing, and runs the tests in travis.

Change-Id: I83ce525fd11e11579cc58ba5308d01ca8eea7bc6

1 files changed, 1 insertions, 1 deletions

diff --git a/context_test.go b/context_test.go
index 5d9f4bc..b05c541 100644
--- a/context_test.go
+++ b/context_test.go
@@ -95,7 +95,7 @@ func TestContextParse(t *testing.T) {
 		}
 	`)
 
-	_, _, _, errs := ctx.parse(".", "Blueprint", r, nil)
+	_, _, errs := ctx.parse(".", "Blueprint", r, nil)
 	if len(errs) > 0 {
 		t.Errorf("unexpected parse errors:")
 		for _, err := range errs {