Improving Makefile support for shared libraries.

-) Properly linking built-in OpenSSL into the grpc library.
-) grpc now properly depends on gpr when linking shared code.
-) Properly naming the shared library with all their aliases.
-) Properly installing the shared library aliases on the system.
-) Potentially supporting Darwin and MINGW32 targets for shared libraries.

Caveat: if using shared libraries, some tests will not compile anymore if they want to use OpenSSL functions, as they are no longer publically available externally. Which is the feature we were seeking.

The Makefile currently does it properly, by linking the tests statically. This only applies when using external code and Makefiles, if said external code improperly assumes SSL is available through grpc.
	Change on 2014/12/22 by nnoble <nnoble@google.com>
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=82656438