[Bug target/102352] New: Add -mstack-protector-guard=... for arm32

[kees at outflux dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102352

            Bug ID: 102352
           Summary: Add -mstack-protector-guard=... for arm32
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: kees at outflux dot net
  Target Milestone: ---

As done for powerpc (1b3254e4bbe82245421a55324bc8fe34a99c6e3c), aarch64
(cd0b2d361df82c848dc7e1c3078651bb0624c3c6), riscv
(c931e8d5a96463427040b0d11f9c4352ac22b2b0), and x86
(e1769bdd4cef522ada32aec863feba41116b183a), the arm32 target needs
mstack-protector-guard= support as well, so that the kernel can gain per-thread
stack canaries on arm32:
https://github.com/KSPP/linux/issues/29