Fix more compile failures caused by recent ARM toolchain upgrade.

ports/libtommath/build.sh

Index: ports/libtommath/build.sh
diff --git a/ports/libtommath/build.sh b/ports/libtommath/build.sh
index 487cab2b6eeb52b4e8c0e49f217e10f9502a16b1..e1acc6650d027d82be5d6c707fcadb46d2d21f90 100644
--- a/ports/libtommath/build.sh
+++ b/ports/libtommath/build.sh
@@ -6,18 +6,26 @@ BUILD_DIR=${SRC_DIR}
 MAKE_TARGETS=mtest
 EXECUTABLES=mtest/mtest${NACL_EXEEXT}
 
+# Workaround for arm-gcc bug:
+# https://code.google.com/p/nativeclient/issues/detail?id=3205
+# TODO(sbc): remove this once the issue is fixed
+if [ "${NACL_ARCH}" = "arm" ]; then
+  NACLPORTS_CPPFLAGS+=" -mfpu=vfp"
+fi
+
 BuildStep() {
   SetupCrossEnvironment
   DefaultBuildStep
 }
 
-#TestStep() {
+TestStep() {
   # To run tests, pipe mtest.nexe output into test.nexe input
   #   mtest/mtest.exe | test.nexe
   # However, this test is setup to run forever, so we don't run
   # it as part of the build.
   #RunSelLdrCommand mtest/mtest.nexe | RunSelLdrCommand test.nexe
-#}
+  return
+}
 
 InstallStep() {
   # copy libs and headers manually