[security] Without verifying whether malloc is successful, copy the enclave buf outside directly

[jmp0x7c00]

same to #70

Town-Crier/src/Enclave/scrapers/steam2.cpp

Line 223 in 78e1996

*resp = reinterpret_cast<char *>(malloc(len + 1));

*resp may be NULL

here is a memory copy, the content of query1 can be leaked outside enclave.

Town-Crier/src/Enclave/scrapers/steam2.cpp

Line 224 in 78e1996

memcpy(*resp, query1, len);

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same issue:

Town-Crier/src/Enclave/test/regex_test.cpp

Line 80 in 78e1996

s = (char *) realloc(s, s_len + n1 + n2 + n3 + 1);

Town-Crier/src/Enclave/test/regex_test.cpp

Line 81 in 78e1996

memcpy(s + s_len, buf, n1);