librpc: add host build to install h files needed for nfs-kernel-server to get compiled

Signed-off-by: Peter Wagner <tripolar@gmx.at>

package/libs/librpc/Makefile

@@ -10,6 +10,7 @@ PKG_SOURCE_VERSION:=a921e3ded051746f9f7cd5e5a312fb6771716aac
 PKG_MIRROR_HASH:=22c8dc55e1c4e8e31635a37708a3ce622a6ca33ebd918a4321b0be6ffce89b21
 CMAKE_INSTALL:=1
 PKG_USE_MIPS16:=0
+PKG_BUILD_DEPENDS:=librpc/host
 
 PKG_LICENSE:=LGPL-2.1
 PKG_LICENSE_FILES:=
@@ -17,6 +18,7 @@ PKG_LICENSE_FILES:=
 PKG_MAINTAINER:=Felix Fietkau <nbd@nbd.name>
 
 include $(INCLUDE_DIR)/package.mk
+include $(INCLUDE_DIR)/host-build.mk
 include $(INCLUDE_DIR)/cmake.mk
 
 define Package/librpc
@@ -30,4 +32,11 @@ define Package/librpc/install
 	$(INSTALL_DATA) $(PKG_INSTALL_DIR)/usr/lib/librpc.so $(1)/lib/
 endef
 
+define Host/Install
+	$(INSTALL_DIR) $(STAGING_DIR_HOSTPKG)/include/rpc
+	$(INSTALL_DATA) $(HOST_BUILD_DIR)/rpc/types.h $(STAGING_DIR_HOSTPKG)/include/rpc
+	$(INSTALL_DATA) $(HOST_BUILD_DIR)/rpc/compat.h $(STAGING_DIR_HOSTPKG)/include/rpc
+endef
+
+$(eval $(call HostBuild))
 $(eval $(call BuildPackage,librpc))