Fix issue in previous commit

Even with shared we need to build the static library since programs are using
it.
diff --git a/library/Makefile b/library/Makefile
index 72e376c..36c8a40 100644
--- a/library/Makefile
+++ b/library/Makefile
@@ -68,7 +68,7 @@
 ifndef SHARED
 all: static
 else
-all: shared
+all: shared static
 endif
 
 static: libpolarssl.a