Add libgit2, libssh2 from meta-oe for rust

(From OE-Core rev: a6e49314f64b65b3a165d33ae581b6761ded0e82)

Signed-off-by: Randy MacLeod <Randy.MacLeod@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-support/libssh2/libssh2_1.8.2.bb

@@ -0,0 +1,27 @@
+SUMMARY = "A client-side C library implementing the SSH2 protocol"
+HOMEPAGE = "http://www.libssh2.org/"
+SECTION = "libs"
+
+DEPENDS = "zlib"
+
+LICENSE = "BSD"
+LIC_FILES_CHKSUM = "file://COPYING;md5=c5cf34fc0acb44b082ef50ef5e4354ca"
+
+SRC_URI = "http://www.libssh2.org/download/${BP}.tar.gz"
+
+SRC_URI[md5sum] = "616efd99af3d9ef731a26bed6cee9593"
+SRC_URI[sha256sum] = "088307d9f6b6c4b8c13f34602e8ff65d21c2dc4d55284dfe15d502c4ee190d67"
+
+inherit autotools pkgconfig
+
+EXTRA_OECONF += "\
+                 --with-libz \
+                 --with-libz-prefix=${STAGING_LIBDIR} \
+                "
+
+# only one of openssl and gcrypt could be set
+PACKAGECONFIG ??= "openssl"
+PACKAGECONFIG[openssl] = "--with-openssl --with-libssl-prefix=${STAGING_LIBDIR},--without-openssl,openssl"
+PACKAGECONFIG[gcrypt] = "--with-libgcrypt --with-libgcrypt-prefix=${STAGING_EXECPREFIXDIR},--without-libgcrypt,libgcrypt"
+
+BBCLASSEXTEND = "native"