sqlcipher: fix static linking with openssl

sqlcipher: fix static linking with openssl

Pass the needed libraries in LIBS instead of LDFLAGS so they end up last on
the linker cmdline, fixing static linking.

Fixes:
http://autobuild.buildroot.net/results/59d/59d8d7c7f3e0a205503121c1288187471c0ce80f/
http://autobuild.buildroot.net/results/2ed/2ed2026bc5502807588a9335bd4c78e0a26c1cd3/
http://autobuild.buildroot.net/results/cd3/cd35b24422cf7f8697e81ca7f0dd2f06dfc55997/
http://autobuild.buildroot.net/results/aa2/aa24359a0d7d9bb4e00ba96cb80301f59466ab90/

And many more.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>