Do not export osslsigncode.c consts #850

Job	Run time
build (windows-x86-vs, x86-windows, vs, x86, windows-latest, Ninja, C:/vcpkg, C:/Users/runneradmi...	7m 15s
build (ubuntu-24.04, x64-linux, gcc, ubuntu-24.04, Unix Makefiles)	36s
build (windows-x64-mingw, x64-windows, mingw, windows-latest, Ninja, C:/vcpkg, C:/Users/runneradm...	9m 13s
build (windows-x64-vs, x64-windows, vs, x64, windows-latest, Ninja, C:/vcpkg, C:/Users/runneradmi...	8m 33s
build (ubuntu-22.04, x64-linux, gcc, ubuntu-22.04, Unix Makefiles)	36s
build (macOS, arm64-osx, clang, macOS-latest, Unix Makefiles, /usr/local/share/vcpkg, /Users/runn...	2m 4s
build (windows-x64-static-vs, x64-windows-static, vs, x64, windows-latest, Ninja, C:/vcpkg, C:/Us...	8m 2s
	36m 19s

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