compile.py: add Clang lib/ dir to LD_LIBRARY_PATH on Linux.

scripts/slave/compile.py

Index: scripts/slave/compile.py
diff --git a/scripts/slave/compile.py b/scripts/slave/compile.py
index d3783d36d92bc01dd7cac82ea5a5e3902775d372..ed12e9c8eb1746f62f01980dd79aeedddcdd3be9 100755
--- a/scripts/slave/compile.py
+++ b/scripts/slave/compile.py
@@ -939,6 +939,13 @@ def main_ninja(options, args):
 
     command = ['ninja', '-w', 'dupbuild=err', '-C', options.target_output_dir]
 
+    if chromium_utils.IsLinux() and options.compiler in ('clang', 'goma-clang'):
+      clang_lib_dir = os.path.abspath(os.path.join(options.src_dir,
+          'third_party', 'llvm-build', 'Release+Asserts', 'lib'))
+      if not 'LD_LIBRARY_PATH' in env:
+        env['LD_LIBRARY_PATH'] = ''
+      env['LD_LIBRARY_PATH'] += clang_lib_dir + ':'
+
     # HACK(yyanagisawa): update environment files on |env| update.
     # For compiling on Windows, environment in environment files are used.
     # It means even if enviroment such as GOMA_DISABLED is updated in