Fix a mistake in rL351392.

PGOInstrGen should be initialized to "" instead of false.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@351397 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/IPO/PassManagerBuilder.cpp b/lib/Transforms/IPO/PassManagerBuilder.cpp
index cbf46ff..b92d3ba 100644
--- a/lib/Transforms/IPO/PassManagerBuilder.cpp
+++ b/lib/Transforms/IPO/PassManagerBuilder.cpp
@@ -162,7 +162,7 @@
     MergeFunctions = false;
     PrepareForLTO = false;
     EnablePGOInstrGen = false;
-    PGOInstrGen = false;
+    PGOInstrGen = "";
     PGOInstrUse = "";
     PGOSampleUse = "";
     PrepareForThinLTO = EnablePrepareForThinLTO;