Building against openssl from Yocto results in a build break:
```
| /opt/work/upstream/fsl-xwayland/tmp/work/cortexa53-crypto-fsl-linux/optee-test/3.15.0.imx-r0/git/host/xtest/regression_8100.c:133:17: error: 'ERR_get_error_line' is deprecated: Since OpeSL 3.0 [-Werror=deprecated-declarations]
| 133 | e = ERR_get_error_line(&f, &l);
| | ^
| In file included from /opt/work/upstream/fsl-xwayland/tmp/work/cortexa53-crypto-fsl-linux/optee-test/3.15.0.imx-r0/git/host/xtest/regression_8100.c:18:
| /opt/work/upstream/fsl-xwayland/tmp/work/cortexa53-crypto-fsl-linux/optee-test/3.15.0.imx-r0/recipe-sysroot/usr/include/openssl/err.h:411:15: note: declared here
| 411 | unsigned long ERR_get_error_line(const char **file, int *line);
| | ^~~~~~~~~~~~~~~~~~
```
Configure optee-test to build with its own openssl.
Signed-off-by: Tom Hochstein <tom.hochstein@nxp.com>
CROSS_COMPILE_HOST=${HOST_PREFIX} \
CROSS_COMPILE_TA=${HOST_PREFIX} \
CROSS_COMPILE=${HOST_PREFIX} \
- OPTEE_OPENSSL_EXPORT=${STAGING_INCDIR}/ \
-C ${S} O=${B} \
"