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ARROW-8968: [C++][Gandiva] set data layout for pre-compiled IR to llvm::module

This PR explicitly sets data layout for pre-compiled IR to `llvm:module`. Without the PR, the following warning message is shown at link time of gandiva.

Most of this code comes from https://reviews.llvm.org/D80130 by @imaihal in llvm.

```
~/arrow/cpp/src/gandiva$ ../../build/debug/gandiva-binary-test -V
Running main() from /home/ishizaki/arrow/cpp/googletest_ep-prefix/src/googletest_ep/googletest/src/gtest_main.cc
[==========] Running 1 test from 1 test case.
[----------] Global test environment set-up.
[----------] 1 test from TestBinary
[ RUN      ] TestBinary.TestSimple
warning: Linking two modules of different data layouts: 'precompiled' is 'E-m:e-i1:8:16-i8:8:16-i64:64-f128:64-a:8:16-n32:64' whereas 'codegen' is 'E-m:e-i1:8:16-i8:8:16-i64:64-f128:64-v128:64-a:8:16-n32:64'

[       OK ] TestBinary.TestSimple (41 ms)
[----------] 1 test from TestBinary (41 ms total)

[----------] Global test environment tear-down
[==========] 1 test from 1 test case ran. (41 ms total)
[  PASSED  ] 1 test.
```

Closes #7295 from kiszk/ARROW-8968

Authored-by: Kazuaki Ishizaki <ishizaki@jp.ibm.com>
Signed-off-by: Wes McKinney <wesm+git@apache.org>