test: fix missing-braces error
test: fix missing-braces error

test/unit/test_options.c:64:54: error: suggest braces around
initialization of subobject [-Werror,-Wmissing-braces]
static TSS2_TCTI_CONTEXT_COMMON_V2 tcti_instance = { 0, };
Since unitialized global/static variables are automatically
zeroed we can just remove the initialization.

Signed-off-by: Tadeusz Struk <ac7da5bc34fbda078ba4af5ef710d2a59a2316f5@intel.com>

01org/tpm2.0-tools,01org/tpm2.0-tools,01org/tpm2.0-tools