Make ready for release of 1.3.8 and soversion 7
diff --git a/library/Makefile b/library/Makefile
index 281353a..d637417 100644
--- a/library/Makefile
+++ b/library/Makefile
@@ -22,9 +22,9 @@
 CFLAGS += -fPIC
 endif
 
-SONAME=libpolarssl.so.6
+SONAME=libpolarssl.so.7
 
-DLEXT=so.6
+DLEXT=so.7
 # OSX shared library extension:
 # DLEXT=dylib