gallivm: (trivial) Fix typo in comment introduced by 70dc8a

Fix typo in comment introduced by 70dc8a

Signed-off-by: Alexandre Demers <alexandre.f.demers@gmail.com>
Signed-off-by: Jose Fonseca <jfonseca@vmware.com>

src/gallium/auxiliary/gallivm/lp_bld_misc.cpp

@@ -502,7 +502,7 @@ lp_build_create_jit_compiler_for_module(LLVMExecutionEngineRef *OutJIT,
 
 #if HAVE_LLVM >= 0x0306
        builder.setMCJITMemoryManager(std::unique_ptr<RTDyldMemoryManager>(MM));
-       MM = NULL; // onwership taken by std::unique_ptr
+       MM = NULL; // ownership taken by std::unique_ptr
 #else
        builder.setMCJITMemoryManager(MM);
 #endif