[libpeas] Fix running make check for the docs

[Garrett Regier <gregier src gnome org>]

commit a5a76161324aff030f32ebc46c1c72af0f5ae4df
Author: Garrett Regier <garrettregier gmail com>
Date:   Tue Jan 27 00:17:10 2015 -0800

    Fix running make check for the docs

 docs/reference/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/docs/reference/Makefile.am b/docs/reference/Makefile.am
index 05e841e..a123a3c 100644
--- a/docs/reference/Makefile.am
+++ b/docs/reference/Makefile.am
@@ -111,6 +111,6 @@ TESTS_ENVIRONMENT = \
        DOC_MAIN_SGML_FILE=$(DOC_MAIN_SGML_FILE)
 
 check-local: $(GTKDOC_CHECK)
-       @$(TESTS_ENVIRONMENT) $(GTKDOC_CHECK)
+       @$(TESTS_ENVIRONMENT) ./$(GTKDOC_CHECK)
 
 endif