grpc: make SHARED library build optional

Shared library build is known to not work on win32
platforms. Make it configurable.

Signed-off-by: Sinan Kaya <okaya@kernel.org>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-devtools/grpc/grpc_1.38.1.bb

@@ -34,12 +34,11 @@ EXTRA_OECMAKE = " \
     -DgRPC_RE2_PROVIDER=package \
     -DgRPC_INSTALL=ON \
     -DCMAKE_CROSSCOMPILING=ON \
-    -DBUILD_SHARED_LIBS=ON \
     -DgRPC_INSTALL_LIBDIR=${baselib} \
     -DgRPC_INSTALL_CMAKEDIR=${baselib}/cmake/${BPN} \
     "
 
-PACKAGECONFIG ??= "cpp"
+PACKAGECONFIG ??= "cpp shared"
 PACKAGECONFIG[cpp] = "-DgRPC_BUILD_GRPC_CPP_PLUGIN=ON,-DgRPC_BUILD_GRPC_CPP_PLUGIN=OFF"
 PACKAGECONFIG[csharp] = "-DgRPC_BUILD_GRPC_CSHARP_PLUGIN=ON,-DgRPC_BUILD_GRPC_CSHARP_PLUGIN=OFF"
 PACKAGECONFIG[node] = "-DgRPC_BUILD_GRPC_NODE_PLUGIN=ON,-DgRPC_BUILD_GRPC_NODE_PLUGIN=OFF"
@@ -48,6 +47,7 @@ PACKAGECONFIG[php] = "-DgRPC_BUILD_GRPC_PHP_PLUGIN=ON,-DgRPC_BUILD_GRPC_PHP_PLUG
 PACKAGECONFIG[python] = "-DgRPC_BUILD_GRPC_PYTHON_PLUGIN=ON,-DgRPC_BUILD_GRPC_PYTHON_PLUGIN=OFF"
 PACKAGECONFIG[ruby] = "-DgRPC_BUILD_GRPC_RUBY_PLUGIN=ON,-DgRPC_BUILD_GRPC_RUBY_PLUGIN=OFF"
 PACKAGECONFIG[protobuf-lite] = "-DgRPC_USE_PROTO_LITE=ON,-DgRPC_USE_PROTO_LITE=OFF,protobuf-lite"
+PACKAGECONFIG[shared] = "-DBUILD_SHARED_LIBS=ON,-DBUILD_SHARED_LIBS=OFF,,"
 
 do_configure:prepend() {
     sed -i -e "s#lib/pkgconfig/#${baselib}/pkgconfig/#g" ${S}/CMakeLists.txt