Enable TestDataFormatterStdMap on linux (libstdc++) with clang.

[sivachandra]

Summary

This test should have been enabled along with
7181dae1248cc1b03505cca1b7c6e3dfeffefc0a, but since the test was
actually crashing, I thought it was a much deeper problem. Turns out,
all I had to do was to add "-fno-limit-debug-info" when compiling
the test case.

The test is still skipped when the testcase is compiled with GCC.

lldb/trunk/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/map/Makefile

 LEVEL = ../../../../../make
 
 CXX_SOURCES := main.cpp
 
 USE_LIBSTDCPP := 1
 
+# clang-3.5+ outputs FullDebugInfo by default for Darwin/FreeBSD
+# targets.  Other targets do not, which causes this test to fail.
+# This flag enables FullDebugInfo for all targets.
+ifneq (,$(findstring clang,$(CC)))
+  CFLAGS_EXTRAS += -fno-limit-debug-info
+endif
+
 include $(LEVEL)/Makefile.rules

lldb/trunk/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/map/TestDataFormatterStdMap.py

def test_with_dsym_and_run_command(self):
         self.buildDsym()
         self.data_formatter_commands()
 
     @skipIfGcc # llvm.org/pr15036: When built with GCC, this test causes lldb to crash with
                # assert DeclCXX.h:554 queried property of class with no definition
     @expectedFailureIcc   # llvm.org/pr15301: LLDB prints incorrect size of
                           # libstdc++ containers
     @skipIfFreeBSD
-    @skipIfLinux # non-core functionality, need to reenable and fix
-                 # later (DES 2014.11.07). Most likely failing because
-                 # of mis-match is version of libstdc++ supported by
-                 # the data-formatters.
     @dwarf_test
     def test_with_dwarf_and_run_command(self):
         """Test data formatter commands."""
         self.buildDwarf()
         self.data_formatter_commands()
 
     def setUp(self):
         # Call super's setUp().