Kludge file location from Caller().

The behavior of Caller() is not guaranteed, and sometimes contains
artifacts of optimization.  Work around its unpredictability by adding
another case.

compiler/go/build.go

diff --git a/compiler/go/build.go b/compiler/go/build.go
index 80612f5..14ee90a 100644
--- a/compiler/go/build.go
+++ b/compiler/go/build.go
@@ -41,6 +41,9 @@
 
 func init() {
 	_, buildGO, _, _ = runtime.Caller(1)
+	if buildGO == "<autogenerated>" {
+		_, buildGO, _, _ = runtime.Caller(0)
+	}
 	buildDir = path.Dir(buildGO)
 	configGO = path.Join(buildDir, "cfc", "config.go")
 

runtime/go/build.go

diff --git a/runtime/go/build.go b/runtime/go/build.go
index 6990749..0df28ae 100644
--- a/runtime/go/build.go
+++ b/runtime/go/build.go
@@ -44,6 +44,9 @@
 
 func init() {
 	_, buildGO, _, _ = runtime.Caller(1)
+	if buildGO == "<autogenerated>" {
+		_, buildGO, _, _ = runtime.Caller(0)
+	}
 	buildDir = path.Dir(buildGO)
 	configGO = path.Join(buildDir, "clownfish", "config.go")
 	cfbindGO = path.Join(buildDir, "clownfish", "cfbind.go")