gitignore: add generated unity sources for lib and src #1481

Job	Run time
AmigaOS, AM gcc AmiSSL m68k	34s
AmigaOS, CM gcc AmiSSL m68k	29s
Android 21, AM openssl arm64	1m 22s
Android 21, CM openssl arm64	1m 9s
FreeBSD, AM clang openssl x86_64	4m 54s
MS-DOS, AM djgpp openssl i586	46s
FreeBSD, AM clang openssl arm64	10m 22s
Android 35, AM openssl arm64	6m 53s
iOS, AM libressl arm64	1m 47s
Android 35, CM openssl arm64	50s
MS-DOS, CM djgpp openssl i586	39s
FreeBSD, CM clang openssl arm64	5m 46s
iOS, CM libressl arm64	45s
Android 35, CM boringssl !zstd arm64	1m 0s
iOS, CM-Xcode libressl arm64	4m 39s
NetBSD, CM clang openssl x86_64	7m 4s
OmniOS, AM gcc openssl amd64	7m 36s
OpenBSD, CM clang libressl x86_64	4m 25s
	1h 1m 0s

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