[3.13] gh-128605: Add branch protections for x86_64 in asm_trampoline.S (GH-128606...

[3.13] gh-128605: Add branch protections for x86_64 in asm_trampoline.S (GH-128606) (GH-135077) (#135083)

[3.14] gh-128605: Add branch protections for x86_64 in asm_trampoline.S (GH-128606) (GH-135077)

Apply Intel Control-flow Technology for x86-64 on asm_trampoline.S.

Required for mitigation against return-oriented programming (ROP)
and Call or Jump Oriented Programming (COP/JOP) attacks.

Manual application is required for the assembly files.

See also: https://sourceware.org/annobin/annobin.html/Test-cf-protection.html
(cherry picked from commit 899cca6dbf76bf3e06a99f60a5f996ad6ba0761f)

Co-authored-by: stratakis <cstratak@redhat.com>