[5.0.8] configure generates `ompi_cv_fortran_common_alignment=<string>`

[dalcinl]

While trying to workaround an build regression issue issue in 5.0.8 with cross-compiling in conda-forge, I ran configure natively on maOS-arm64 and Linux-x86_64.

After inspecting configure.log, I noticed the following line:

ompi_cv_fortran_common_alignment='   16'

that is, the value is quoted string, rather than an integer.

This is likely inconsequential, as the quotes eventually disappear in the Makefiles.

[jsquyres]

Thanks @dalcinl! I filed master PR #13286 to fix; will cherry pick to v5.0.x when it merges.