Subzero. ARM32. Enable hwdiv-arm crosstests.

Makefile.standalone

 # The following variables will likely need to be modified, depending on where
 # and how you built LLVM & Clang. They can be overridden in a command-line
 # invocation of make, like:
 #
 #   make LLVM_SRC_PATH=<path> LIBCXX_INSTALL_PATH=<path> CLANG_PATH=<path> \
 #        PNACL_BIN_PATH=<path> ...
 #
 
 # LLVM_SRC_PATH is the path to the root of the checked out source code. This
 # directory should contain the configure script, the include/ and lib/
@@ skipping 417 matching lines @@
         $(LLVM_SRC_PATH)/utils/lit/lit.py -sv $(CHECK_LIT_TESTS) \
             $(FORCEASM_LIT_TEST_EXCLUDES) $(FORCEASM_LIT_PARAM)
 
 ifdef MINIMAL
 check-xtest: $(OBJDIR)/pnacl-sz make_symlink runtime
         @echo "Crosstests disabled, minimal build"
 else
 check-xtest: $(OBJDIR)/pnacl-sz make_symlink runtime
        # Do all native/sse2 tests, but only test_vector_ops for native/sse4.1.
        # For (slow) sandboxed tests, limit to Om1/sse4.1.
+       # run.py (used to run the sandboxed xtests) does not support
+       # specifying -cpu cortex-a15 to qemu, hence we disable the
+       # hwdiv-arm tests.
         ./pydir/crosstest_generator.py -v --lit \
           --toolchain-root $(TOOLCHAIN_ROOT) \
           $(FORCEASM_FLAG) \
           $(FORCEASM_XTEST_EXCLUDES) \
           -i x8632,native,sse2 \
           -i x8632,native,sse4.1,test_vector_ops \
           -i x8632,sandbox,sse4.1,Om1 \
           -i x8632,nonsfi,sse2,O2 \
           -i x8664,native,sse2 \
           -i x8664,native,sse4.1,test_vector_ops \
           -i x8664,sandbox,sse4.1,Om1 \
-          -i arm32,neon
+          -i arm32 \
+          -e arm32,sandbox,hwdiv-arm \
+          -e arm32,neon,test_vector_ops
         PNACL_BIN_PATH=$(PNACL_BIN_PATH) \
         $(LLVM_SRC_PATH)/utils/lit/lit.py -sv $(CHECK_XTEST_TESTS)
 endif
 
 check-unit: $(OBJDIR)/run_unittests
         $(OBJDIR)/run_unittests
 
 # List the spec2k components in roughly reverse order of runtime, to help with
 # parallel execution speed.
 ALLSPEC := 253.perlbmk 177.mesa 188.ammp 256.bzip2 164.gzip 179.art 183.equake \
@@ skipping 106 matching lines @@
         @cat Makefile.standalone-help/check-lit.txt
 
 help-check-xtest:
         @cat Makefile.standalone-help/check-xtest.txt
 
 clean:
         rm -rf pnacl-sz *.o $(OBJDIR) $(SB_OBJDIR) build/pnacl-sz.bloat.json
 
 clean-all: clean
         rm -rf build/  crosstest/Output/