[NaCl SDK] Cleanup references to old newlib toolchain

native_client_sdk/src/build_tools/build_projects.py

Index: native_client_sdk/src/build_tools/build_projects.py
diff --git a/native_client_sdk/src/build_tools/build_projects.py b/native_client_sdk/src/build_tools/build_projects.py
index 1646d6be8b540c4b7fe5524b90f1887ac29d5d34..fe168cdc1c76645cd65865349efaa06e405fbf5c 100755
--- a/native_client_sdk/src/build_tools/build_projects.py
+++ b/native_client_sdk/src/build_tools/build_projects.py
@@ -30,7 +30,6 @@ LIB_DICT = {
   'win': ['x86_32']
 }
 VALID_TOOLCHAINS = [
-  'newlib',
   'clang-newlib',
   'glibc',
   'pnacl',
@@ -291,9 +290,9 @@ def main(args):
   if not options.toolchain:
     # Order matters here: the default toolchain for an example's Makefile will
     # be the first toolchain in this list that is available in the example.
-    # e.g. If an example supports newlib and glibc, then the default will be
-    # newlib.
-    options.toolchain = ['pnacl', 'newlib', 'glibc', 'host', 'clang-newlib']
+    # e.g. If an example supports clang-newlib and glibc, then the default will
+    # be clang-newlib.
+    options.toolchain = ['pnacl', 'clang-newlib', 'glibc', 'host']
 
   if 'host' in options.toolchain:
     options.toolchain.remove('host')