First pass at reorganizing org.apache.harmony.xnet.provider.jsse native code into a single file.

At enh's suggestion, I'm consoldiating the OpenSSL related native code
into a single wrapper class NativeCrypto. This changes is the firs
step, combining the cpp code into a single NativeCode.cpp. The next
step will involved introducting a single SSL_CTX in NativeCode and
cleaning up SSL_CTX use. As part of this, I'll start moving the native
wrappers to from various OpenSSL*.java classes into NativeCode.
diff --git a/Register.c b/Register.c
index 7427972..92c0e9d 100644
--- a/Register.c
+++ b/Register.c
@@ -59,13 +59,6 @@
     if (register_org_apache_harmony_text_BidiWrapper(env) != 0)
         goto bail;
 
-    if (register_org_apache_harmony_xnet_provider_jsse_OpenSSLSocketImpl(env) != 0)
-        goto bail;
-    if (register_org_apache_harmony_xnet_provider_jsse_OpenSSLServerSocketImpl(env) != 0)
-        goto bail;
-    if (register_org_apache_harmony_xnet_provider_jsse_OpenSSLSessionImpl(env) != 0)
-        goto bail;
-
     if (register_org_openssl_NativeBN(env) != 0)
         goto bail;
     if (register_org_apache_harmony_xnet_provider_jsse_NativeCrypto(env) != 0)