[Fix] Declare things before using them

Summary:
We always spit out the .fws.h file after the corresponding .h file. But the
.fws.h file can never depend on anything in the .h file (it just declares
StaticStrings, ScalarArrays and other compile time constants).

I dont think the .h file should depend on the .fws.h file either - but we found
a case where it did. I'll try to find a better fix, but including the .fws.h
should be completely safe, and fixes the immediate issue.

Test Plan: fast_tests slow_tests

Reviewers: qigao, myang

Reviewed By: myang

CC: edward, ps, mwilliams, myang

Differential Revision: 341485

Task ID: 756563

src/compiler/analysis/analysis_result.cpp

@@ -4713,8 +4713,8 @@ void AnalysisResult::outputCPPClusterImpl(CodeGenerator &cg,
     getTrueDeps(fs, toInclude);
   }
   BOOST_FOREACH(FileScopePtr fs, files) {
-    cg_printInclude(fs->outputFilebase());
     cg_printInclude(fs->outputFilebase() + ".fws");
+    cg_printInclude(fs->outputFilebase());
     toInclude.erase(fs->getName());
   }
   cg.printSection("Dependencies");