Add signature file for VBA projects (2nd try) #98

Job	Run time
Cmake (gcc)	1m 22s
Cmake (gcc, -DBUILD_EXAMPLES=ON -DBUILD_TESTS=ON)	1m 34s
Cmake (gcc, -DUSE_DTOA_LIBRARY=ON -DBUILD_TESTS=ON)	1m 29s
Cmake (gcc, -DUSE_MEM_FILE=ON -DBUILD_TESTS=ON)	1m 12s
Cmake (gcc, -DUSE_NO_MD5=ON -DBUILD_TESTS=ON)	1m 43s
Cmake (gcc, -DUSE_OPENSSL_MD5=ON -DBUILD_TESTS=ON)	1m 53s
Cmake (gcc, -DUSE_STANDARD_TMPFILE=ON -DBUILD_TESTS=ON)	3m 13s
Cmake (gcc, -DUSE_SYSTEM_MINIZIP=ON -DBUILD_TESTS=ON)	1m 8s
Cmake (gcc, -DUSE_SYSTEM_MINIZIP=ON -DUSE_OPENSSL_MD5=ON -DBUILD_TESTS=ON)	1m 52s
Cmake (clang)	1m 27s
Cmake (clang, -DBUILD_EXAMPLES=ON -DBUILD_TESTS=ON)	2m 14s
Cmake (clang, -DUSE_DTOA_LIBRARY=ON -DBUILD_TESTS=ON)	2m 1s
Cmake (clang, -DUSE_MEM_FILE=ON -DBUILD_TESTS=ON)	1m 43s
Cmake (clang, -DUSE_NO_MD5=ON -DBUILD_TESTS=ON)	1m 30s
Cmake (clang, -DUSE_OPENSSL_MD5=ON -DBUILD_TESTS=ON)	1m 56s
Cmake (clang, -DUSE_STANDARD_TMPFILE=ON -DBUILD_TESTS=ON)	1m 31s
Cmake (clang, -DUSE_SYSTEM_MINIZIP=ON -DBUILD_TESTS=ON)	1m 28s
Cmake (clang, -DUSE_SYSTEM_MINIZIP=ON -DUSE_OPENSSL_MD5=ON -DBUILD_TESTS=ON)	1m 43s
	30m 59s

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