nanopb: Split into 2 packages

This makes it possible to avoid building components which are not used
in the native or runtime tooling. Most users of nanopb just want to
build `nanopb-generator-native` and `nanopb-runtime` and not the other
two combinations as they are building software for their target
leveraging nanopb.

Signed-off-by: William A. Kennington III <wak@google.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/dynamic-layers/meta-python/recipes-devtools/nanopb/nanopb.inc

@@ -0,0 +1,13 @@
+DESCRIPTION="Protocol Buffers with small code size"
+LICENSE="Zlib"
+LIC_FILES_CHKSUM = "file://LICENSE.txt;md5=9db4b73a55a3994384112efcdb37c01f"
+
+SRC_URI = "git://github.com/nanopb/nanopb.git;branch=master;protocol=https"
+SRCREV = "6cfe48d6f1593f8fa5c0f90437f5e6522587745e"
+
+S = "${WORKDIR}/git"
+
+inherit cmake
+
+BBCLASSEXTEND = "native nativesdk"
+