Fix loading absolute path libs with LD_LIBRARY_PATH

Commit 5aa5b08 changed the way
libraries are dynamically loaded when `LD_LIBRARY_PATH` is set to only
take the filename into account and not the complete path. This seems to
be overlooked code meant for testing as the commit is about video
testing and not library loading.

Revert the file to its previous state to fix loading libraries that are
specified with absolute paths.

Fixes GitHub issue KhronosGroup#479.

framework/delibs/deutil/deDynamicLibrary.c

@@ -29,8 +29,6 @@
 /* Posix implementation. */
 
 #include <dlfcn.h>
-#include <libgen.h>
-#include <stdlib.h>
 
 struct deDynamicLibrary_s
 {
@@ -43,18 +41,7 @@ deDynamicLibrary *deDynamicLibrary_open(const char *fileName)
     if (!library)
         return NULL;
 
-    if (getenv("LD_LIBRARY_PATH"))
-    {
-        // basename() requires a non-const string because it may modify the its contents, so we cannot pass fileName to
-        // it directly. The string may be coming from statically allocated memory. E.g. this segfaulted in FreeBSD.
-        char *aux = deStrdup(fileName);
-        if (!aux)
-            return NULL;
-        library->libHandle = dlopen(basename(aux), RTLD_LAZY);
-        deFree(aux);
-    }
-    else
-        library->libHandle = dlopen(fileName, RTLD_LAZY);
+    library->libHandle = dlopen(fileName, RTLD_LAZY);
 
     if (!library->libHandle)
     {