clang: Link lld against tcmalloc.

tools/clang/scripts/package.py

Index: tools/clang/scripts/package.py
diff --git a/tools/clang/scripts/package.py b/tools/clang/scripts/package.py
index 151cb357820101e56c6189c11eb37a2915c35a47..d0aded21d6e3bef6d325687c6006124b02b8711c 100755
--- a/tools/clang/scripts/package.py
+++ b/tools/clang/scripts/package.py
@@ -26,6 +26,8 @@ LLVM_BOOTSTRAP_INSTALL_DIR = os.path.join(THIRD_PARTY_DIR,
 LLVM_BUILD_DIR = os.path.join(THIRD_PARTY_DIR, 'llvm-build')
 LLVM_RELEASE_DIR = os.path.join(LLVM_BUILD_DIR, 'Release+Asserts')
 LLVM_LTO_GOLD_PLUGIN_DIR = os.path.join(THIRD_PARTY_DIR, 'llvm-lto-gold-plugin')
+BINUTILS_LIB_DIR = os.path.join(THIRD_PARTY_DIR, 'binutils', 'Linux_x64',
+                                'Release', 'lib')
 STAMP_FILE = os.path.join(LLVM_BUILD_DIR, 'cr_build_revision')
 
 
@@ -322,6 +324,12 @@ def main():
     shutil.copytree(os.path.join(LLVM_BOOTSTRAP_INSTALL_DIR, 'include', 'c++'),
                     os.path.join(pdir, 'include', 'c++'))
 
+  # Copy tcmalloc from the binutils package.
+  # FIXME: We should eventually be building our own copy.
+  if sys.platform.startswith('linux'):
+    shutil.copy(os.path.join(BINUTILS_LIB_DIR, 'libtcmalloc_minimal.so.4'),
+                os.path.join(pdir, 'lib'))
+
   # Copy buildlog over.
   shutil.copy('buildlog.txt', pdir)