[tools] Fixed MSVC code generation in pbc_to_exe to avoid expensive string concatenation (implied by TT #1572).
[tools] Fixed MSVC code generation in pbc_to_exe to avoid expensive string
concatenation (implied by TT #1572).

git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@45872 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot