Add version_script property

Add version_script property to cc_library to pass a file to
the linker with --version-script.

Change-Id: Ieefb04e15c8dfa72c2eb63b4349f8860222662b2
diff --git a/androidbp/cmd/soong.go b/androidbp/cmd/soong.go
index 18b8af0..1841381 100644
--- a/androidbp/cmd/soong.go
+++ b/androidbp/cmd/soong.go
@@ -70,6 +70,7 @@
 	"local_include_dirs":  {"LOCAL_C_INCLUDES", prependLocalPath},
 	"export_include_dirs": {"LOCAL_EXPORT_C_INCLUDE_DIRS", prependLocalPath},
 	"suffix":              {"LOCAL_MODULE_STEM", prependLocalModule},
+	"version_script":      {"LOCAL_LDFLAGS", versionScript},
 }
 
 var ignoredProperties = map[string]bool{