Add preprocess bison files to the gyp files.

We had accidentally left out the y and l files from our generation
scripts, causing us to miss several instances of updated enum names.

BUG=angle:550
Change-Id: I8790742fbaab5435e4c0db4f61c3e8194a231550
Reviewed-on: https://chromium-review.googlesource.com/186972
Reviewed-by: Nicolas Capens <nicolascapens@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>
diff --git a/src/compiler/preprocessor/Tokenizer.l b/src/compiler/preprocessor/Tokenizer.l
index 1046a6f..6c53f51 100644
--- a/src/compiler/preprocessor/Tokenizer.l
+++ b/src/compiler/preprocessor/Tokenizer.l
@@ -257,7 +257,7 @@
 
     if (YY_START == COMMENT)
     {
-        yyextra->diagnostics->report(pp::Diagnostics::EOF_IN_COMMENT,
+        yyextra->diagnostics->report(pp::Diagnostics::PP_EOF_IN_COMMENT,
                                      pp::SourceLocation(yyfileno, yylineno),
                                      "");
     }
@@ -307,7 +307,7 @@
     token->type = yylex(&token->text, &token->location, mHandle);
     if (token->text.size() > kMaxTokenLength)
     {
-        mContext.diagnostics->report(Diagnostics::TOKEN_TOO_LONG,
+        mContext.diagnostics->report(Diagnostics::PP_TOKEN_TOO_LONG,
                                      token->location, token->text);
         token->text.erase(kMaxTokenLength);
     }