Fix incorrect path in run_code_generation.py

Adding missing "src".

BUG=angleproject:2267
TEST=python scripts/run_code_generation.py

Change-Id: I89d981c8f09e6d0839d0b796a2ea14a8466f98a7
Reviewed-on: https://chromium-review.googlesource.com/952925
Reviewed-by: Olli Etuaho <oetuaho@nvidia.com>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
diff --git a/scripts/run_code_generation.py b/scripts/run_code_generation.py
index 282b8f5..a2282c3 100755
--- a/scripts/run_code_generation.py
+++ b/scripts/run_code_generation.py
@@ -153,7 +153,7 @@
         ],
         'outputs': [
             'src/compiler/translator/SymbolTable_autogen.cpp',
-            'tests/compiler_tests/ImmutableString_test_autogen.cpp',
+            'src/tests/compiler_tests/ImmutableString_test_autogen.cpp',
         ],
         'script': 'src/compiler/translator/gen_builtin_symbols.py',
     },