buildtools-tarball: add nativesdk-rpcsvc-proto

Fedora28 repackages rpcgen program to rpcgen
package and the program will no longer be
part of the glibc-common package.
fedora 28:
$ rpm -qf /usr/bin/rpcgen
rpcgen-1.3.1-4.fc28.x86_64

fedora 27:
$ rpm -qf /usr/bin/rpcgen
glibc-common-2.26-27.fc27.x86_64

Once build a project on fedora28 host without
installing the extra rpcgen package, there
comes below error:
ERROR: Unable to start bitbake server
ERROR: Last 10 lines of server log for this session (/yocto/builds/upgrade2/bitbake-cookerdaemon.log):
    self.cooker = bb.cooker.BBCooker(self.configuration, self.featureset)
  File "/yocto/poky/bitbake/lib/bb/cooker.py", line 197, in __init__
    self.initConfigurationData()
  File "/yocto/poky/bitbake/lib/bb/cooker.py", line 356, in initConfigurationData
    self.databuilder.parseBaseConfiguration()
  File "/yocto/poky/bitbake/lib/bb/cookerdata.py", line 317, in parseBaseConfiguration
    raise bb.BBHandledException
bb.BBHandledException
ERROR: The following required tools (as specified by HOSTTOOLS) appear to be unavailable in PATH, please install them in order to proceed:
  rpcgen

So add nativesdk-rpcsvc-proto to provide the
program rpcgen to fix the gap.

(From OE-Core rev: 52fbf46a32f03266e31811fde7d4466e7ef85fc8)

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

meta/recipes-core/meta/buildtools-tarball.bb

@@ -24,6 +24,7 @@ TOOLCHAIN_HOST_TASK ?= "\
     nativesdk-ca-certificates \
     nativesdk-texinfo \
     nativesdk-libnss-nis \
+    nativesdk-rpcsvc-proto \
     "
 
 MULTIMACH_TARGET_SYS = "${SDK_ARCH}-nativesdk${SDK_VENDOR}-${SDK_OS}"