Update tp2 clang path to fix clang build

Summary: clang was removed from tp2 so change to llvm-fb.

Test Plan:
  USE_CLANG=1 make all -j64

Reviewers: yhchiang, andrewkr, kradhakrishnan, sdong, lightmark, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: andrewkr, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D59259

build_tools/dependencies.sh

@@ -1,5 +1,5 @@
 GCC_BASE=/mnt/vol/engshare/fbcode/third-party2/gcc/4.9.x/centos6-native/108cf83/
-CLANG_BASE=/mnt/gvfs/third-party2/clang/fc904e50a9266b9d7b98cae1993afa0c5aae1440/3.7.1/centos6-native/9d9ecb9/
+CLANG_BASE=/mnt/vol/engshare/fbcode/third-party2/llvm-fb/stable/centos6-native/7aaccbe/
 LIBGCC_BASE=/mnt/gvfs/third-party2/libgcc/53e0eac8911888a105aa98b9a35fe61cf1d8b278/4.9.x/gcc-4.9-glibc-2.20/024dbc3
 GLIBC_BASE=/mnt/gvfs/third-party2/glibc/ee36ac9a72dfac4a995f1b215bb4c0fc8a0f6f91/2.20/gcc-4.9-glibc-2.20/500e281
 SNAPPY_BASE=/mnt/gvfs/third-party2/snappy/8c38a4c1e52b4c2cc8a9cdc31b9c947ed7dbfcb4/1.1.3/gcc-4.9-glibc-2.20/e9936bf

build_tools/fbcode_config.sh

@@ -100,7 +100,7 @@ if [ -z "$USE_CLANG" ]; then
   JEMALLOC=1
 else
   # clang
-  CLANG_INCLUDE="$CLANG_LIB/clang/*/include"
+  CLANG_INCLUDE="$CLANG_LIB/clang/stable/include"
   CC="$CLANG_BIN/clang"
   CXX="$CLANG_BIN/clang++"
 
@@ -114,6 +114,7 @@ else
   CFLAGS+=" -isystem $CLANG_INCLUDE"
   CFLAGS+=" -isystem $KERNEL_HEADERS_INCLUDE/linux "
   CFLAGS+=" -isystem $KERNEL_HEADERS_INCLUDE "
+  CFLAGS+=" -Wno-expansion-to-defined "
   CXXFLAGS="-nostdinc++"
 fi
 

build_tools/update_dependencies.sh

@@ -65,7 +65,7 @@ echo "Writing dependencies to $OUTPUT"
 
 # Compilers locations
 GCC_BASE=`ls -d1 $TP2_LATEST/gcc/4.9.x/centos6-native/*/ | head -n1`
-CLANG_BASE=`ls -d1 /mnt/gvfs/third-party2/clang/fc904e50a9266b9d7b98cae1993afa0c5aae1440/3.7.1/centos6-native/*/ | head -n1`
+CLANG_BASE=`ls -d1 $TP2_LATEST/llvm-fb/stable/centos6-native/*/ | head -n1`
 
 log_variable GCC_BASE
 log_variable CLANG_BASE