Non-SFI NaCl: Do not create unwind tables for libc_free.c

ARM GCC emits references to EABI symbols like __aeabi_unwind_cpp_pr0
and they are causing a link error because recently we have added

TEST=./out/Release/browser_tests --gtest_filter='*NonSfi*'
     # Note we cannot test this on ARM yet.
TEST=ninja browser_tests (for ARM Chrome OS)

Review URL:

git-svn-id: svn:// 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed