rpm: rebuild rdkafka gem

Signed-off-by: Kentaro Hayashi <hayashi@clear-code.com>

Author: kenhys

fluent-package/yum/fluent-package.spec.in

@@ -153,6 +153,8 @@ The stable distribution of Fluentd, formerly known as td-agent.
 
 rake build:rpm_config FLUENT_PACKAGE_STAGING_PATH=%{buildroot} NO_VAR_RUN=1
 rake build:all FLUENT_PACKAGE_STAGING_PATH=%{buildroot} PATH="$HOME/.cargo/bin:$PATH"
+# Do not use prebuilt rdkafka gem because of missing @GLIBC_ symbol error
+rake build:all FLUENT_PACKAGE_STAGING_PATH=%{buildroot} REBUILD_GEMS="rdkafka" PATH="$HOME/.cargo/bin:$PATH"
 mkdir -p %{buildroot}%{_mandir}/man1
 cp @PACKAGE@/debian/*.1 %{buildroot}%{_mandir}/man1/
 for man in `find %{buildroot} -type f -wholename '*/man/man[1-9]/*.[1-9]'`; do