[java-atk-wrapper] Require java 7 for build, since the code cannot be built with source/target level 6

[Federico Mena Quintero <federico src gnome org>]

commit e01484cadb9d0b0efe89772fcceb9f8b3d43ec0a
Author: Fridrich Štrba <fridrich strba bluewin ch>
Date:   Fri Oct 27 09:08:59 2017 +0200

    Require java 7 for build, since the code cannot be built with source/target level 6

 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/configure.ac b/configure.ac
index adc45ae..c2d1f07 100644
--- a/configure.ac
+++ b/configure.ac
@@ -44,7 +44,7 @@ AC_SUBST(LIB_ATK_WRAPPER_LD_FLAGS)
 # java wrapper
 
 AM_CONDITIONAL(USER, test `whoami` = "root")
-JAVA_REQUIRED=1.6
+JAVA_REQUIRED=1.7.0
 JAVA_ERROR_MESSAGE="Java $JAVA_REQUIRED or later is required to build java-access-bridge"
 
 AC_ARG_VAR([JAVA_HOME],[Java Runtime Environment location])