Link against OpenSSL statically (#149)

Summary:
Compile against a static version of OpenSSL for better compatibility
with apps that already use OpenSSL in some fashion.
Pull Request resolved: https://github.com/facebook/Sonar/pull/149

Reviewed By: priteshrnandgaonkar

Differential Revision: D8804169

Pulled By: passy

fbshipit-source-id: 4de66a77806a3b3f01b2cf5f253916f2cf6f48e8

xplat/build.gradle

@@ -30,4 +30,3 @@ android {
         implementation project(':folly')
     }
 }
-//'armeabi-v7a'