[toolvers] bump gcc to 5.2.0
diff --git a/toolvers b/toolvers
index a43eab3..cf60893 100644
--- a/toolvers
+++ b/toolvers
@@ -1,4 +1,4 @@
-GCCVER=5.1.0
+GCCVER=5.2.0
 BINVER=2.25
 GDBVER=7.9
 GMPVER=5.1.3