Configure should conditionally add `-fno-reorder-blocks-and-partition`

[indygreg]

Bug report

--enable-bolt currently unconditionally adds -fno-reorder-blocks-and-partition. This flag isn't implemented on Clang and breaks the build in this configuration.

PR forthcoming.

Linked PRs

• gh-101060: conditionally add -fno-reorder-blocks-and-partition #101061

[corona10]

Current status

clangclangclangclangclang: : : : : clangerror: error: : error: clangerror: error: unknown argument: '-fno-reorder-blocks-and-partition'clangunknown argument: '-fno-reorder-blocks-and-partition'unknown argument: '-fno-reorder-blocks-and-partition'unknown argument: '-fno-reorder-blocks-and-partition'

unknown argument: '-fno-reorder-blocks-and-partition'error:

: unknown argument: '-fno-reorder-blocks-and-partition'error: unknown argument: '-fno-reorder-blocks-and-partition'
: error:
unknown argument: '-fno-reorder-blocks-and-partition'

[corona10]

Now BOLT build supports clang too.