Revert "[lld][test][LoongArch] Remove the test for R_LARCH_CALL36 range checking"

This reverts commit 0fbc728d.

In 88548df0, both the .sec.foo and .tex sections used the same
section flags, hence sharing one segment, pushing the output file
size too large. This breaks on many buildbots.

Now assign section .sec.foo different flags ("awx") from .text ("ax")
so that both sections get their own segment.