[lldb] [testsuite] TestGdbRemoteLibrariesSvr4Support: Fix symlinked builddir

[jankratochvil]

Summary

When I have symlinked builddir on Fedora 31 x86_64 I get:

FAIL: test_libraries_svr4_libs_present (TestGdbRemoteLibrariesSvr4Support.TestGdbRemoteLibrariesSvr4Support)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/jkratoch/redhat/llvm-monorepo/lldb/packages/Python/lldbsuite/test/decorators.py", line 140, in wrapper
    func(*args, **kwargs)
  File "/home/jkratoch/redhat/llvm-monorepo/lldb/packages/Python/lldbsuite/test/decorators.py", line 110, in wrapper
    func(*args, **kwargs)
  File "/home/jkratoch/redhat/llvm-monorepo/lldb/packages/Python/lldbsuite/test/tools/lldb-server/libraries-svr4/TestGdbRemoteLibrariesSvr4Support.py", line 133, in test_libraries_svr4_libs_present
    self.libraries_svr4_libs_present()
  File "/home/jkratoch/redhat/llvm-monorepo/lldb/packages/Python/lldbsuite/test/tools/lldb-server/libraries-svr4/TestGdbRemoteLibrariesSvr4Support.py", line 106, in libraries_svr4_libs_present
    self.assertIn(self.getBuildDir() + "/" + lib, libraries_svr4_names)
AssertionError: '/home/jkratoch/redhat/llvm-monorepo-clangassertsymlink/lldb-test-build.noindex/tools/lldb-server/libraries-svr4/TestGdbRemoteLibrariesSvr4Support.test_libraries_svr4_libs_present/libsvr4lib_a.so' not found in ['/home/jkratoch/redhat/llvm-monorepo/lldb/packages/Python/lldbsuite/test/tools/lldb-server/libraries-svr4/linux-vdso.so.1', '/quad/home/jkratoch/redhat/llvm-monorepo-clangassertsymlink/lldb-test-build.noindex/tools/lldb-server/libraries-svr4/TestGdbRemoteLibrariesSvr4Support.test_libraries_svr4_libs_present/libsvr4lib_a.so', '/quad/home/jkratoch/redhat/llvm-monorepo-clangassertsymlink/lldb-test-build.noindex/tools/lldb-server/libraries-svr4/TestGdbRemoteLibrariesSvr4Support.test_libraries_svr4_libs_present/libsvr4lib_b".so', '/usr/lib64/libdl-2.30.so', '/usr/lib64/libstdc++.so.6.0.27', '/usr/lib64/libm-2.30.so', '/usr/lib64/libgcc_s-9-20190827.so.1', '/usr/lib64/libc-2.30.so', '/usr/lib64/ld-2.30.so']
Config=x86_64-/quad/home/jkratoch/redhat/llvm-monorepo-clangassertsymlink/bin/clang-11
----------------------------------------------------------------------

I think the fix is trivial, right?

[jankratochvil]

That testcase has been created by D62502.

lldb/packages/Python/lldbsuite/test/tools/lldb-server/libraries-svr4/TestGdbRemoteLibrariesSvr4Support.py

class TestGdbRemoteLibrariesSvr4Support(gdbremote_testcase.GdbRemoteTestCaseBase):
 
     def libraries_svr4_libs_present(self):
         xml_root = self.get_libraries_svr4_xml()
         libraries_svr4_names = []
         for child in xml_root:
             name = child.attrib.get("name")
             libraries_svr4_names.append(os.path.realpath(name))
         for lib in self.get_expected_libs():
-            self.assertIn(self.getBuildDir() + "/" + lib, libraries_svr4_names)
+            self.assertIn(os.path.realpath(self.getBuildDir() + "/" + lib), libraries_svr4_names)
 
     @llgs_test
     @skipUnlessPlatform(["linux", "android", "netbsd"])
     def test_supports_libraries_svr4(self):
         self.setup_test()
         self.assertTrue(self.has_libraries_svr4_support())
 
     @llgs_test