binarystore: Move binarystoreblob_lib to static library

This way bitbake does not have to install libbinarystore.so directly.

Change-Id: If3171f50329cea146113a1f7a7ad3a1771fd5f1b
Signed-off-by: Willy Tu <wltu@google.com>
diff --git a/src/meson.build b/src/meson.build
index 5432b3a..ca4b091 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -11,7 +11,7 @@
   ]
 )
 
-binarystoreblob_lib = library(
+binarystoreblob_lib = static_library(
   'binarystoreblob',
   'binarystore.cpp',
   'sys.cpp',