zookeeper failed to build on 10.11

[apjanke]

https://gist.github.com/d65372d3eb89fc0af8b6

Build failing with C compilation error.

/bin/sh ./libtool  --tag=CC   --mode=compile clang -DHAVE_CONFIG_H -I.  -I./include -I./tests -I./generated  -Wall -Werror  -g -O2 -D_GNU_SOURCE -c -o zookeeper.lo `test -f 'src/zookeeper.c' || echo './'`src/zookeeper.c
libtool: compile:  clang -DHAVE_CONFIG_H -I. -I./include -I./tests -I./generated -Wall -Werror -g -O2 -D_GNU_SOURCE -c src/zookeeper.c  -fno-common -DPIC -o .libs/zookeeper.o
In file included from src/zookeeper.c:27:
In file included from ./include/zookeeper.h:34:
./include/recordio.h:76:9: error: expected ')'
int64_t htonll(int64_t v);
        ^
/Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/include/sys/_endian.h:141:25: note: expanded from macro 'htonll'
#define htonll(x)       __DARWIN_OSSwapInt64(x)

[DomT4]

Moving to tracking in #40837. If you report this one upstream let us know in that thread and I'll add a link to that report, Thanks!