Rollup merge of #139785 - fneddy:fix_test_cstring_merging_alignment, r=Mark-Simulacrum

Let CStrings be either 1 or 2 byte aligned.

We see a regression on the `tests/assembly/cstring-merging.rs` test on s390x.

Some architectures (like s390x) require strings to be 2 byte aligned. Therefor the section name will be marked with a .2  postfix on this architectures.

Allowing a section name with a .1 or .2 postfix will make the test pass on either platform.

Author: Zalathar