COFF: Add IMAGE_SCN_MEM_READ to text sections.

There are currently 100 references to COFF::IMAGE_SCN in 6 files
and 11 different functions. Section to attribute mapping really
needs to happen in one place to avoid problems like this.

llvm-svn: 117473

lib/CodeGen/TargetLoweringObjectFileImpl.cpp

@@ -952,6 +952,7 @@ getCOFFSectionFlags(SectionKind K) {
   else if (K.isText())
     Flags |=
       COFF::IMAGE_SCN_MEM_EXECUTE |
+      COFF::IMAGE_SCN_MEM_READ |
       COFF::IMAGE_SCN_CNT_CODE;
   else if (K.isBSS ())
     Flags |=